Oxidise, Don't Mask: The Chemistry of Skunk Spray, Why Tomato Juice Fails and Why the Smell Comes Back

1. Introduction: a smell that outlasts the wash

A dog sprayed by a skunk is washed, dried and declared clean, and then, on the first damp evening, smells of skunk again. The usual explanation is that the wash was not thorough enough. The chemistry says otherwise.

1.1 Three questions

What makes the smell, why it returns, and why the most famous remedy does not work.

1.2 What this article argues

That skunk odour is a problem of molecules rather than of dirt, that the only remedy that works changes those molecules, and that the same chemistry accounts for a rare but real hazard to dogs. Sections 7, 12 and 20 are the case.

1.3 Why a pest control journal covers it

Skunks den under decks, porches and sheds, and the odour that follows a spraying near a house is often the first sign that one has moved in. The smell is where a structural problem announces itself, so its chemistry belongs alongside the exclusion work that ends it.

That framing is ours.

2. What the spray is for

Defence, used reluctantly.

Skunk musk is produced by anal scent glands and squirted through small protrusions at a target, with a range of about ten feet and good aim; adults usually give warning first, striped skunks by hissing, stomping and raising the tail, and spotted skunks by doing a handstand.³

2.1 A last resort for the skunk

Skunks do not want to spray unless they have to,³ which is why most sprayings follow a dog that ignored the warnings.

The second clause is our inference.

2.2 Where dogs are hit

One owner's guide notes that dogs usually take the spray in the neck area, because they are sprayed while provoking the skunk and turn their heads to avoid it.¹¹

2.3 Which puts it near the eyes and nose

Spray around the head is why eye care features in every veterinary instruction on skunk exposure, and why the dog's own sense of smell is overwhelmed as well as its owner's.

That connection is ours.

3. The odour compounds

The compounds in striped skunk spray fall into two major groups, thiols and acetate derivatives of those thiols. Two of the thiols, (E)-2-butene-1-thiol and 3-methyl-1-butanethiol, are responsible for the strongly repellent odour.⁷

3.1 A heavier third thiol

A third thiol, 2-quinolinemethanethiol, is less odorous because of its low volatility, and because large thiols do not trigger the human olfactory receptor as strongly.⁷

3.2 An alkaloid

A further component, 2-methylquinoline, was identified in the nineteenth century and is one of the significant molecules in the spray.²

3.3 Sulfur at low concentration is familiar

The chemist who studied the spray points out that sulfur compounds matter in food at low concentrations; one, methanethiol, is found in fresh coffee.⁴

3.4 Research across species

The chemist and colleagues also analysed the defensive spray of the hooded skunk,¹⁴ part of a body of work showing species-specific differences within a shared thiol chemistry.²

3.5 Thiols are not unique to skunks

The same wildlife control source that tells the formula's history notes that thiols are produced naturally, often in association with the degradation of protein.¹⁰ The skunk has concentrated a common class of chemistry into a weapon.

The second sentence is ours.

4. The compound that was not there

A textbook error.

For decades 1-butanethiol was named as the cause of skunk odour. A 1970s analysis found that the malodorous volatile portion of striped skunk musk contains (E)-2-butene-1-thiol, 3-methyl-1-butanethiol and a related disulfide, but no 1-butanethiol.⁵

4.1 Described as a myth

A summary of that paper describes 1-butanethiol as having gained a terrible reputation as the cause of the odour, and the authors as defeating a popular organic chemistry myth.⁵

4.2 Earlier identifications were partly wrong too

The chemist's history notes that some structural assignments in earlier work were incorrect, and that two investigations reported compounds that could not be confirmed later and may have been artefacts of isolation or analysis.¹

5. How the error survived

In a patent.

A United States patent describing a method for neutralising offensive chemicals states that the primary odour-causing factors in skunk spray are n-butanethiol and 2-methylbutanethiol.⁶

5.1 The corrected identification is different

Neither matches the two thiols the later chemistry names as responsible.⁷

5.2 A familiar pattern

This journal has traced similar drift before, in the retelling of the London Underground mosquito's origin. A corrected fact does not recall the documents that carried the old one.

That comparison is ours.

5.3 It does not change the remedy

Every candidate compound is a thiol, and thiols are what oxidation neutralises, so the practical advice survives the error.

That point is our reading.

6. The thioacetates

A discovery.

From the 1980s, William Wood of Humboldt State University identified a new type of component in striped skunk spray, the thioacetates of the already known thiols.² His university credits him as the first to discover a thioacetate in skunk spray.⁴

6.1 Mild in themselves

The thioacetates are not as odorous as the thiols, but they are easily converted to the more potent thiols by water.⁷

7. Why the smell comes back

The chemist's explanation is that this conversion may be why pets previously sprayed will again have a faint skunky odour on damp evenings.⁷ A science programme gives the same account for a pet that starts to smell again after a bath.³

7.1 The spray carries its own reserve

A wash that removes or neutralises the free thiols leaves the thioacetates, and water later makes new thiols from them. The returning smell is not a failed wash; it is the second half of the chemistry.

That framing is ours.

7.2 Extension guidance says the same in practice

A university extension publication notes that skunk odour may reactivate during periods of high humidity.⁸

7.3 Why damp evenings in particular

Hydrolysis needs water. Dew, rain and humid air supply it without anyone bathing the dog, so the smell reappears on its own schedule rather than the owner's.

That explanation is our reading of the hydrolysis account in §6.

8. Species differ

Not every skunk carries the reserve.

A follow-up study of the spotted skunk found both main thiols but not their thioacetates, while the hog-nosed skunk produces one thiol and one thioacetate.²

8.1 Striped skunks are the relevant species here

The chemistry described in §§3 to 7 is that of the striped skunk, the species most of the research concerns and the one common across the prairies.

The prairie range statement is general knowledge rather than a sourced claim.

8.2 The word has travelled

The university chemistry page notes that beer exposed to light develops an off flavour sometimes called lightstruck, or skunking, and offers it as a clue to the chemistry.² The name records a resemblance that drinkers noticed before anyone identified the molecules.

The second sentence is ours.

9. Why soap does not work

Water and oil.

Thiols are not water-soluble, even with soap.⁹ The patent describes the spray as quite hydrophobic, so that removing it by ordinary means such as soap and water is very difficult.⁶

9.1 Soap still has a role

In the formula described below, the soap disperses and breaks up the oils in the spray so that the other ingredients can reach the thiols.¹⁰

9.2 The same problem as poison ivy

The patent that discusses skunk spray was principally concerned with neutralising urushiol, the oil of poison ivy, and records that the same oxidising compositions also deodorise low molecular weight thiols despite their hydrophobic nature.⁶

9.3 Oily molecules need a different approach

Both are oily residues that water alone does not lift, and in both cases the answer is to change the molecule rather than to rinse harder.

That parallel is ours.

10. Why tomato juice seems to work

Folklore holds that tomato juice neutralises skunk spray; the chemist's history attributes its apparent success to human olfactory fatigue.¹

10.1 The patent agrees

It records that soaking exposed articles in tomato juice or perfumed detergents for long periods had been suggested but had not proven effective.⁶

10.2 And so does a science programme

Which calls the tomato juice remedy a myth.³

10.3 Why the myth has lasted

Tomato juice is in most kitchens, is strongly coloured and scented, and is applied at the moment the bather's nose is most fatigued. Every condition for a remedy to seem to work is present, whether or not it does.

That explanation is ours, extending the olfactory fatigue account in §10.

11. Olfactory fatigue as a measurement problem

Our reading.

The person judging whether the remedy worked is the person who has just spent twenty minutes bathing a dog in skunk spray. Their nose has adapted, so the smell seems to fade whatever is applied, and tomato juice gets the credit.

11.1 The same instrument cannot be used before and after

A fair test would need someone who had not been exposed to judge the result. Without that, every remedy looks effective to the person using it.

11.2 And the smell returns anyway

When the thioacetates convert on the next damp evening, the fresh nose of a family member notices what the bather's could not.

Sections 11 to 11.2 are our reasoning from §§7 and 10.

11.3 What a fair test would need

A standard exposure, remedies assigned at random, and assessors who had not been near the animal and did not know which remedy it received, smelling at fixed intervals including after the next wetting. We found no published study of that design.

That design is our proposal.

12. The chemistry that does work

Oxidation.

The odorous thiols in skunk spray can easily be neutralised by oxidation to sulfonic acids.¹ A university chemistry resource describes this as the best approach, using hydrogen peroxide as the oxidising agent together with baking soda.²

12.1 The product is soluble and odourless

The mixture oxidises thiols into water-soluble sulfonates, which then rinse away.⁹

12.2 Industry uses a harder route

The patent notes that thiols can also be oxidised to disulfides, as in sweetening sour natural gas, but that this requires catalysts, high temperatures and continuous flow reactors.⁶

12.3 Which is why a kitchen formula matters

An oxidation that works at room temperature on fur, with household ingredients, is the practical achievement.

That assessment is ours.

12.4 Why the mixture must be used at once

One guide describes hydrogen peroxide and baking soda combined as a chemical engine for churning out oxygen, which is why it has to be used immediately after mixing.¹¹

12.5 An open question about the reserve

The sources describe the formula oxidising thiols.⁹ Whether it also destroys the thioacetates, or leaves some of them to convert later, is something we could not establish. If it leaves them, a smell returning after a correct treatment would not mean the treatment failed, and a second application after the next wetting would be the sensible response.

The question and the suggested response are ours.

13. Where the formula came from

A laboratory problem first.

The formula was devised by Paul Krebaum, a chemist at an Illinois manufacturer, to rid his laboratory of odour while he was researching thiols, and used there for some time before a colleague asked for help with a cat that had been sprayed.¹⁰

13.1 Published, not patented

Because of packaging difficulties, he decided against patenting it and placed it in the public domain.¹⁰ It was published in a chemistry trade magazine in October 1993.⁹

13.2 A dating note

One personal website gives the publication date as October 1994;¹¹ the veterinary source cites 1993, and we follow it.⁹

13.3 Popularised by the researcher

The skunk chemist's university notes that he popularised the neutraliser alongside his research.⁴

13.4 What it replaced

The wildlife control source describes the formula as devised as an alternative to tomato juice or the tincture of time, that is, waiting.¹⁰ Before a chemical remedy, the realistic options were masking and patience.

The second sentence is ours.

14. The formula

As an extension publication gives it.

One quart of fresh 3 per cent hydrogen peroxide, a quarter cup of baking soda and one to two teaspoons of liquid dish soap, mixed in an open container and used immediately; left on for five minutes, then rinsed with water, and repeated as needed, keeping it out of eyes and mouth.⁸

14.1 Outside, if possible

A veterinary source advises bathing pets outside so the spray does not contaminate household furnishings, and flushing the eyes with tepid water after ocular exposure.⁹

14.2 Not stronger peroxide

A pet food company's guidance warns against peroxide stronger than 3 per cent because it can irritate skin.¹⁸

14.3 Why fresh peroxide

The extension recipe specifies a fresh bottle,⁸ and one guide explains that hydrogen peroxide eventually turns into water, so an old, opened bottle has lost much of what the formula needs.¹¹

14.4 For larger dogs

A pet food company's version adds a quart of lukewarm water for large dogs to ensure complete coverage.¹⁸

14.5 Repeat rather than strengthen

The extension guidance says to repeat as needed.⁸ Given the warning against stronger peroxide in §14.2, a second application is the safer route than a more concentrated one.

That comparison is ours.

15. Why it cannot be bottled

The chemistry again.

The peroxide releases oxygen, so the mixture must not be stored in a closed container, which could break.⁹ The extension publication warns that a closed container may explode.⁸

15.1 Which is why there is no shelf product of this exact recipe

The property that makes the formula work is the property that stopped its inventor patenting it.¹⁰

15.2 And cannot be kept for later

A household that mixes a batch in advance, to be ready for the next spraying, creates both a pressure hazard and a mixture that will have lost its activity by the time it is needed.

That point is ours, from §§12.4 and 14.3.

16. Its costs

An oxidiser is an oxidiser.

The formula may bleach a pet's fur, as well as clothing, towels and carpets.⁹ The researcher's university records a black Labrador that came out looking more like a chocolate one.⁴

16.1 Darker coats show it more

One guide notes that bleaching is more noticeable on black or brown fur, and advises disposing of any excess by dilution with plenty of water.¹⁸

16.2 A reasonable precaution

The extension publication advises testing cleansers on an inconspicuous part of a fabric first.⁸ The same caution makes sense on a small patch of a dark-coated dog before a full application, where time allows.

The application to pets is ours.

17. Fabrics and surfaces

A separate problem.

The extension publication advises against applying the formula directly to clothing, suggesting it be added to the wash instead; it notes that cleaning fluids or household chlorine bleach can remove skunk odour from fabrics, but used one at a time rather than combined, testing first on an inconspicuous area.⁸

17.1 Why separately

Combining different oxidising and cleaning chemicals is exactly the kind of improvised mixing that household chemical guidance warns against in general.

That generalisation is ours; the source gives the instruction without the reason.

18. When odour persists in a building

A diagnostic clue.

The extension publication says that if the odour does not decrease in a week or two, the skunk may have resprayed or died on the property.⁸

18.1 Its general tactics

Remove the source, ventilate, wash or deodorise the source, and use laundry detergent on fabrics.⁸

18.2 A persisting smell is information

In a house, an odour that does not fade on the expected schedule points to an animal still present, under a deck or in a crawlspace, rather than to a cleaning failure.

That inference is ours, following the extension guidance.

18.3 How long odour normally lasts

The extension publication notes that odour from skunks can last several weeks, and that time and air eventually will remove odours from items.⁸

18.4 The simple steps first

It also reminds readers never to overlook the simple act of showering and washing clothes to reduce skunk odour.⁸

18.5 Several weeks is a benchmark

An odour that fades over a few weeks is behaving normally. One that holds steady or grows stronger is the case §18 flags, where an animal is still present.

That benchmark is our reading of the extension guidance.

19. Commercial products

Masking and neutralising are different claims.

The extension publication describes one commercial product as masking skunk odour with a smell described as minty, notes that it has toxic and irritating properties, and advises readers to consider over-the-counter remedies, particularly the peroxide formula, before trying such products.⁸

19.1 A question to ask of any product

Whether it changes the thiol or covers it. A product that masks will fail when the thioacetates convert.

That test is ours.

19.2 Labels can be read for the mechanism

A product that names an oxidiser, or describes converting odour compounds, is making a chemical claim that could be true. One that describes fragrance or freshness is describing a mask, which the thioacetates will outlast.

That reading guide is ours.

20. The same chemistry inside the dog

The rare hazard.

A veterinary source explains that in rare instances Heinz body anaemia, methaemoglobinaemia and haemoglobinuria may occur a few hours to a day after exposure. The thiols react with oxyhaemoglobin in an oxidation-reduction reaction that forms methaemoglobin, thiyl radicals and hydrogen peroxide, which damage haemoglobin and lead to Heinz bodies and the destruction of red cells.⁹

20.1 A symmetry

Outside the dog, peroxide oxidises the thiols and makes them harmless. Inside the red cell, the thiols help generate peroxide and do harm. The same class of reaction runs in opposite directions of benefit.

That observation is ours.

20.2 Why dogs rather than people

Dogs are sprayed at close range around the head and groom themselves afterwards, which may bring more of the secretion into contact with the body than a person's exposure would.

That hypothesis is ours; the sources do not address why reported cases are in animals.

21. The case reports

Few, and cautious.

A 2005 case report described a five-year-old dog examined for lethargy and black faeces, with brown discolouration of mucous membranes and urine, Heinz bodies on blood smears and severe anaemia three days later; the only remarkable history was that the dog had wandered the day before and returned home smelling strongly of skunk spray.¹³

21.1 How many cases

A later paper citing this literature reports three documented cases of dogs with Heinz body anaemia or methaemoglobinaemia after skunk spraying, one of which died, though a causal link to the spray could not be confirmed.¹⁵

21.2 Also in a zoo animal

A captive red panda developed a regenerative anaemia with Heinz bodies after being sprayed.¹²

21.3 What a case report can show

A single case establishes that something can happen and prompts a search for a mechanism. It cannot say how often it happens, which is why the rarity stated by the veterinary source and the small number of documented cases are the right frame.⁹¹⁵

That methodological point is ours.

22. The laboratory evidence

Before 2013, a definite cause-and-effect relationship had not been reported. A laboratory study then exposed red cells from dogs, cats and a red panda to skunk musk and found dose-dependent colour and absorption changes characteristic of methaemoglobin by four hours, increasing over 24 hours in red panda cells and 72 hours in dog and cat cells.¹²

22.1 The authors' conclusion

That in vitro, skunk musk causes Heinz body and methaemoglobin formation in canine, feline and red panda red cells, supporting the clinical association.¹⁴

22.2 Support, not proof

Isolated cells in a tube are not a dog on a lawn, and the study's own language is that it supports an association.

The caution is ours.

22.3 Dose is the open question

The laboratory used musk at 0.04 and 0.4 per cent by volume in contact with red cells.¹² How much of a spray reaches a dog's bloodstream, by skin, eyes or grooming, is not something the study measured, which is why the rarity of clinical cases and the ease of the laboratory result are compatible.

That reconciliation is ours.

23. What that means for owners

Our suggestions, within what the evidence supports.

Most sprayed dogs need a bath, not a veterinarian. A dog that becomes lethargic, has brown gums or urine, or passes black faeces in the day or two after being sprayed is showing the signs the case report describes, and should be seen promptly.¹³⁹

23.1 Spray to the face deserves attention

Eyes should be flushed with tepid water, and the formula kept away from them.⁹⁸

23.2 Two checks after any spraying

Look for bites or scratches, because of rabies, and watch for lethargy or brown gums over the following day or two, because of the rare oxidative harm. Everything else is a cleaning problem.

That checklist is ours, drawing on §§21 and 24.¹¹¹³

24. The rabies question

A sprayed dog has been close to a skunk. In Minnesota, skunks carry the north-central skunk rabies variant, and dogs, cats and livestock are generally exposed to rabies through encounters with skunks.¹⁷

24.1 Among animals submitted there

From 2003 to 2021, 337 of 761 skunks tested in Minnesota were positive, against 5.9 per cent of cattle and 3.8 per cent of bats.¹⁷ Those were animals suspected enough to be submitted, so the figure describes suspects, not all skunks.

24.2 And the variant is active nearby

A June 2026 notification describes ongoing circulation of the north-central skunk variant across the Upper Midwest, with notable rabid skunk detections since 2024 in Iowa, Minnesota and South Dakota.¹⁶

24.3 Spray is not the route

Manitoba's agriculture department describes transmission through a cut, scratch or bite, or mucosal contamination with infectious material, usually saliva.²⁰ The practical concern after a spraying is whether there was also a bite, which is why checking the animal for wounds matters.¹¹

24.4 A question for the owner as well as the dog

An owner who bathed a dog that was bitten as well as sprayed may have handled saliva, which is why a bite found on the dog is a reason to seek public health advice for the people involved, not only veterinary care.

That extension is ours, from the provincial description of transmission.²⁰

25. Skunks and rabies in Manitoba

The provincial record.

Manitoba's public health surveillance states that the animals most often infected with rabies in the province are skunks, cows and foxes, that rabies is reportable, and that suspect cases are verified in a federal rabies laboratory.¹⁹

25.1 Primarily skunks

The agriculture department says rabies in Manitoba is primarily found in skunks, though any mammal can be infected.²⁰

25.2 No human cases on record

The surveillance pages record no reported human cases of rabies in Manitoba.¹⁹

25.3 Vaccination is the buffer

Minnesota's health department describes vaccinating dogs, cats and livestock as providing a buffer between wildlife and people.¹⁷ A sprayed dog with current vaccination is a much smaller worry than one without.

The second sentence is our inference.

25.4 The data are public

The province publishes confirmed animal rabies cases by quarter and samples submitted by health region,¹⁹ so anyone can see how the picture changes from year to year.

26. What we take from it

Three things.

Skunk odour is a molecule problem, not a dirt problem. Sections 3 to 9.⁷⁶

Masking and olfactory fatigue explain the folklore; oxidation is the remedy. Sections 10 to 12.¹

The same oxidation chemistry explains a rare harm, and the skunk itself carries a larger one. Sections 20 to 25.¹²¹⁹

27. Our own position

The disclosure.

This company performs exclusion work, which is how skunks are kept from denning under decks and sheds. We make no claim here about odour treatment or skunk removal services, and nothing in this article describes them.

28. The Manitoba position

28.1 The reservoir is local

Skunks are the animal in which rabies is most often found in the province.¹⁹²⁰

28.2 The chemistry is universal

Nothing in §§3 to 17 depends on location, though our climate's damp spring and autumn evenings are exactly when the thioacetates convert.

28.3 What we did not find

Any Manitoba public guidance specifically on skunk odour removal, or any provincial data on how often pets are sprayed.

28.4 A seasonal pattern worth checking

If spraying of pets clusters in particular months here, as it may with skunk breeding and dispersal, that would be the time to be most careful at dusk. We did not find local data to confirm it.

29. Limitations and open questions

We read summaries of the chemistry. The composition and the thioacetate explanation reach us through the chemist's history, a university teaching page, a science programme, his university's news, and a reproduction of his web text on a pet business site, rather than through the original analytical papers.¹²³⁷

The 1-butanethiol correction is read second-hand. We have the correcting paper's abstract as listed on a research-sharing page, not the paper itself.⁵

No controlled comparison of remedies. We found no published trial comparing tomato juice, commercial products and the peroxide formula with blinded odour assessment, which is the test §11 says is needed.

The formula's history comes from informal sources. Its origin and publication details come from a veterinary trade source, a wildlife control information site and a personal website, which disagree on the year.⁹¹⁰¹¹

The veterinary harm is rare and partly unproven. A handful of case reports and one laboratory study support an association; causation in the one fatal case was not confirmed.¹²¹⁵

The formula's effect on thioacetates is unknown to us. We found no source stating whether the peroxide formula oxidises the thioacetate reserve as well as the free thiols (§12.5).

The rabies figures are borrowed. The numerical data are from Minnesota and describe submitted suspects; we did not extract Manitoba counts.¹⁷

Sections 1.3, 2.1, 2.3, 3.5, 5.2, 5.3, 7.1, 7.3, 8.2, 9.3, 10.3, 11 to 11.3, 12.3, 12.5, 13.4, 14.5, 15.2, 16.2, 17.1, 18.2, 18.5, 19.1, 19.2, 20.1, 20.2, 21.3, 22.2, 22.3, 23, 24.4, 25.3 and 28.4 are our reasoning. The measurement argument about olfactory fatigue, the reserve interpretation of the thioacetates and the practical suggestions are ours rather than sourced positions.

30. Conclusion

Striped skunk spray stinks mainly because of two volatile thiols, (E)-2-butene-1-thiol and 3-methyl-1-butanethiol, and not because of the 1-butanethiol that older textbooks and at least one patent name.⁷⁵⁶ It carries a second set of compounds, thioacetates, which smell mildly but turn into the potent thiols when wet, which is why a washed dog smells again on a damp evening.⁷³ Thiols resist soap and water. Tomato juice owes its reputation to the bather's tired nose.¹⁹

What works changes the molecule: fresh 3 per cent hydrogen peroxide with baking soda and a little dish soap oxidises the thiols to odourless, water-soluble sulfonates. Devised by a chemist for his own laboratory and published in 1993, the formula cannot be bottled because it releases oxygen, can bleach fur and fabric, and must be kept out of eyes.⁸⁹¹⁰

The same oxidising chemistry explains a rare hazard: case reports and a laboratory study link skunk musk to methaemoglobin and Heinz body damage in red cells.¹³¹² And in Manitoba, where skunks are the animal in which rabies is most often found, the more important question after a spraying is not the smell but whether there was also a bite, and whether the dog's vaccination is current.¹⁹²⁰

References

1. The history of skunk defensive secretion research, by the Humboldt State chemist William Wood, published in 1999 and read as its abstract on a research-sharing platform. Peer-reviewed review material. Source for the statements that folklore asserts tomato juice will neutralise skunk odour but human olfactory fatigue can explain the apparent disappearance of the odour on sprayed pets; that the odorous thiols can easily be neutralised by oxidation to sulfonic acids; that some earlier structural assignments were incorrect; and that two investigations reported compounds that could not be confirmed and may have been artefacts. https://www.researchgate.net/publication/226187051_The_History_of_Skunk_Defensive_Secretion_Research
2. Molecule of the Month page on butene thiol, published by a university chemistry school in 2022. Educational institutional material. Source for the identification of 2-methylquinoline in the nineteenth century; the statement that from the 1980s William Wood identified the thioacetates of the known thiols; the composition of spotted and hog-nosed skunk sprays, the spotted skunk lacking thioacetates; and the description of oxidation of thiols to odourless sulfonic acids with hydrogen peroxide and baking soda as the best approach. https://www.chm.bris.ac.uk/motm/skunk-spray/skunkh.htm
3. Article on the chemistry of skunk spray, published by a public broadcaster's science programme. Educational broadcast material. Source for the description of the anal scent glands and papillae, a spraying range of about ten feet, warning signals including hissing, stomping, tail raising and the spotted skunk's handstand; the statement that skunks do not want to spray unless they have to; the explanation that thioacetates become thiols when exposed to water, which may explain a pet smelling skunky again after a bath; and the description of tomato juice as a myth. https://www.pbs.org/wgbh/nova/nature/chemistry-skunk.html
4. University news story on the skunk chemist's research, published in 2009. Institutional publicity material. Source for the statements that he was the first to discover a thioacetate in skunk spray, that he popularised a neutraliser of hydrogen peroxide, baking soda and detergent, that it can lighten fur, with one black Labrador appearing more like a chocolate one, and his remark that methanethiol is found in fresh coffee. https://now.humboldt.edu/news/professors-skunk-research-to-be-on-pbs
5. Abstract listing, on the research-sharing page of reference 1, of a chemistry education paper on 1-butanethiol and the striped skunk. Abstract read second-hand, flagged. Source for the finding that the malodorous volatile portion of striped skunk musk contains trans-2-butene-1-thiol, 3-methyl-1-butanethiol and trans-2-butenyl methyl disulfide but no 1-butanethiol, and the summary describing 1-butanethiol's reputation as a popular organic chemistry myth that the authors defeat. https://www.researchgate.net/publication/226187051_The_History_of_Skunk_Defensive_Secretion_Research
6. United States patent for a method for neutralising offensive chemicals, read from the patent office's document server. Patent material, flagged. Source for its statements that skunk spray is quite hydrophobic and hard to remove with soap and water; that its primary odour-causing factors are n-butanethiol and 2-methylbutanethiol, an identification later chemistry does not support; that tomato juice or perfumed detergents had been suggested but had not proven effective; and that oxidation of thiols to disulfides, as in sweetening sour natural gas, uses catalysts, high temperatures and continuous flow reactors. https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4594239
7. Reproduction of the skunk chemist's web text on the composition of skunk spray, published on a dog training business's blog in 2023. Commercial site reproducing academic text, flagged. Source for the division of the spray into thiols and their acetate derivatives; the two thiols responsible for the odour; the weaker odour of 2-quinolinemethanethiol owing to low volatility and larger size; and the statements that thioacetates are less odorous but easily converted to thiols on water hydrolysis, which may explain pets smelling again on damp evenings. https://souldogsynergy.com/skunk-rinse-recipe-for-dogs/
8. Publication on removing skunk odour, published by a state university's extension service. Educational institutional material. Source for the formula of one quart of fresh 3 per cent hydrogen peroxide, a quarter cup of baking soda and one to two teaspoons of liquid dish soap; mixing in an open container and using immediately because a closed container may explode; avoiding eyes and mouth, leaving it five minutes and rinsing; not applying it directly to clothing; using cleaning fluids or chlorine bleach on fabrics in separate steps rather than together; reactivation of odour in high humidity; the note that odour not decreasing in a week or two may mean the skunk resprayed or died on the property; general odour tactics; and its description of a commercial masking product with toxic and irritating properties. https://extensionpubs.unl.edu/publication/1349/html/view
9. Article on skunk spray toxicosis, published by a veterinary trade publication. Veterinary trade material, flagged. Source for the citation of the formula's publication in a chemistry trade magazine on 18 October 1993; the warnings not to store it in a closed container and that it may bleach fur, clothing, towels and carpets; the statement that thiols are not water-soluble even with soap and are oxidised to water-soluble sulfonates; advice to bathe pets outside and flush eyes with tepid water; and the description of rare Heinz body anaemia, methaemoglobinaemia and haemoglobinuria a few hours to a day after exposure and its mechanism. https://www.dvm360.com/view/skunk-spray-toxicosis-odiferous-tale
10. Page on skunk odour removal published by a wildlife control information site in 2025. Industry information material, flagged. Source for the account that the formula was devised by a chemist at an Illinois manufacturer to rid his laboratory of thiol odour and used there before a colleague asked for help with a sprayed cat; that he decided against patenting it because of packaging and transport difficulties and placed it in the public domain; and that the soap disperses and breaks up the oils in the spray. https://wildlife-control.org/skunk-odor-removal/
11. Personal web page on deskunking pets. Personal website, flagged. Source for its dating of the formula's publication to 18 October 1994, which differs from other sources, and its advice to check a sprayed dog for injury or bites because skunks may carry rabies. https://dan.drydog.com/patsyann/skunk.html
12. Skunk musk causes methaemoglobin and Heinz body formation in vitro, published in a veterinary clinical pathology journal in 2013 and read as its abstract. Peer-reviewed material. Source for the red panda case; the statement that a definite cause-and-effect relationship had not previously been reported; the methods using red cells of three dogs, three cats and a red panda at 0.04 and 0.4 per cent musk; and dose-dependent methaemoglobin changes by four hours increasing over 24 hours in red panda and 72 hours in dog and cat cells. https://pubmed.ncbi.nlm.nih.gov/24033800/
13. Heinz body anaemia in a dog that had been sprayed with skunk musk, published in a veterinary medical association journal in 2005 and read as its abstract. Peer-reviewed case report. Source for the five-year-old dog with lethargy, black faeces, brown discolouration of mucous membranes and urine, Heinz bodies and severe anaemia three days later, whose only remarkable history was returning home smelling strongly of skunk spray. https://pubmed.ncbi.nlm.nih.gov/15882003/
14. The same 2013 study as published by the journal. Peer-reviewed material. Source for the conclusion that in vitro skunk musk causes Heinz body and methaemoglobin formation in canine, feline and red panda red cells, supporting the clinical association between Heinz body haemolytic anaemia and skunk spray exposure; and for its reference list, which includes a 2002 analysis by the skunk chemist and colleagues of volatile components in the defensive spray of the hooded skunk. https://onlinelibrary.wiley.com/doi/10.1111/vcp.12074
15. Citing passage on a research-sharing page for the 2005 case report, from a later paper on a skunk eaten by an alligator. Citing text read second-hand, flagged. Source for the statement that three documented cases of dogs showed Heinz body anaemia or methaemoglobinaemia after skunk spraying, one of which died, though a causal relationship could not be confirmed. https://www.researchgate.net/publication/7859153_Heinz_Body_Anemia_in_a_Dog_That_Had_Been_Sprayed_With_Skunk_Musk
16. Multi-state notification on terrestrial rabies activity in the Upper Midwest, issued through a state animal health board's bulletin service in June 2026. Official government material. Source for ongoing circulation of the north-central skunk rabies variant and notable rabid skunk detections since 2024 in Iowa, Minnesota and South Dakota. https://content.govdelivery.com/accounts/MNBAH/bulletins/41ca7be
17. Rabies surveillance summary published by a state health department. Official government material. Source for skunks carrying the north-central skunk rabies variant; dogs, cats and livestock generally being exposed through encounters with skunks; vaccination of domestic animals as a buffer between wildlife and people; and 337 of 761 skunks, 5.9 per cent of cattle, 3.8 per cent of bats and 2.4 per cent of horses tested positive from 2003 to 2021. https://www.health.mn.gov/diseases/reportable/dcn/rabies.html
18. Blog post on tomato juice and skunk spray, published by a pet food company. Commercial material, flagged. Source for the warnings against hydrogen peroxide stronger than 3 per cent, that bleaching is more noticeable on black or brown fur, and to dispose of excess by diluting with plenty of water. https://www.diamondpet.com/blog/culture/myths/skunked-dog-remedy-myth/
19. Rabies surveillance data published by the Manitoba government's health department, 2023 page. Official government material. Source for the statements that the animals most often infected with rabies in Manitoba are skunks, cows and foxes; that rabies is reportable and suspect cases are verified in a federal rabies laboratory; and that there are no reported human cases of rabies on record in Manitoba. https://www.gov.mb.ca/health/publichealth/diseases/rabiessurveillance2023.html
20. Page on rabies published by the Manitoba government's agriculture department. Official government material. Source for the statements that rabies in Manitoba is primarily found in skunks though any mammal can be infected, and that it is transmitted through a cut, scratch or bite or by mucosal contamination with infectious material, usually saliva. https://www.gov.mb.ca/agriculture/animal-health-and-welfare/animal-health/rabies.html