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A yellow paste, darkening in air, once packed in horns or jars and sold by weight. This is civet, the gland secretion of the African civet. Its smell rests mainly in a seventeen membered ring molecule, and that molecule is now made in the laboratory.

A word in the old pyramid

In classical European perfume formulas, the word civet often appears in the base, beside musk, castoreum and ambergris. Those four animal materials shared one role: to warm, to round, and to hold scent long on skin. Civet was used in very small amounts, enough that no one would notice it as a separate smell.

The question today is no longer what civet smells like, but whether it should be taken from the animal at all. Natural civet comes from caged civets, mainly in Ethiopia. Animal welfare organisations have published reports on the conditions of keeping, and most large fragrance producers have moved to reconstitutions.

This piece does not describe how the secretion is taken from the animal. It follows another path: it puts the ethical question first, then answers it with chemistry. If the smell of civet comes from a few identified molecules, and those molecules can be synthesised, then the animal is no longer necessary for the scent.

On regulation, civet is not named in the index of the IFRA Standards, 51st Amendment, and in the United States it appears on the GRAS list at 21 CFR 182.50. The CITES status of the species should be checked for each exporting country. In other words, the question of civet is first of all not a question of safety law, but a question of how an animal is kept.

The African civet and the source

The species behind civet material is the African civet, Civettictis civetta, of the family Viverridae. The animal has a gland in the perineal region. The secretion is a paste, yellow at first, darkening as it meets the air. Through the 20th century Ethiopia was the main exporter of this material.

In Vietnam the word civet easily calls up another animal. Perfumery civet is not the Asian palm civet, Paradoxurus hermaphroditus, the species linked to civet coffee. The two belong to different genera and are not the same source. The shared English name, civet, is behind a good deal of confusion.

The raw material was once sold in three forms: the crude paste, a tincture in alcohol, and an absolute. Civet tinctures are usually made at low strength and aged for several months before use. The absolute is a brown paste soluble in alcohol.

The Lê Mai library describes the smell of civet at two strengths. Neat: faecal, fetid, harsh. Highly diluted: warm, skin like, like dark honey, lending a white floral glow beside jasmine and tuberose. Extremely tenacious. The distance between those two descriptions is the whole story of this material.

Civetone: a large ring and the smell of skin

The main odorant of civet is civetone, formula C₁₇H₃₀O, molecular weight 250.43 g/mol. Its structure is a seventeen membered carbon ring carrying a ketone group and one cis double bond. In the crude secretion civetone is only a minor share, yet it decides the smell.

Civetone was isolated by E. Sack in 1915. In 1926 Leopold Ružička published the macrocyclic structures of civetone and muscone, the main molecule of deer musk. At the time, many chemists doubted that such large carbon rings could be stable. Two animal scent molecules showed the opposite. Ružička received the 1939 Nobel Prize in Chemistry, largely for his work on terpenes and large rings.

That finding opened the way to the whole group of synthetic macrocyclic musks. The library places civetone in the musk odour family: dense musk with a clear animal, faecal edge when concentrated; on dilution warm, slightly sweet and skin like. It is the smell perfumers call animalic, recalling skin, fur and body.

Civetone is now made synthetically, and the need for natural civet has fallen sharply as a result. The synthetic molecule is identical to the one in nature. It has no dedicated IFRA standard and is not named in the allergen list of EU Regulation 2023/1545. The story of muscone and the other macrocyclic musks is told in the piece musk, from the deer to the ring molecule.

Skatole and indole beside white flowers

Two smaller molecules travel with civetone in the crude secretion, at trace levels: skatole and indole. Both contain a nitrogen ring, and both are known for a paradox: at high concentration they smell faecal, at very low concentration they become part of a floral smell.

Indole, formula C₈H₇N, is the constituent the library calls the dark side of white flower oils. At high doses it is pungent and faecal; at extreme dilution it is the core of jasmine and orange blossom. Jasmine sambac absolute holds about 14.1 percent indole, orange champaca 2.9 to 12.0 percent, jasmine 0.7 to 3.5 percent.

Skatole is indole with an added methyl group, formula C₉H₉N. The German physician Ludwig Brieger described it in 1877, and the name comes from the Greek skatos, meaning dung. At high dilution its smell turns warm, faintly floral, slightly camphoraceous. In perfume skatole is used only in traces, because the smell soon becomes unpleasant.

That paradox explains why civet once stood beside white flowers. A bouquet of jasmine and tuberose already carries indole; add a trace of civet and that dark side is extended, warmed, brought closer to skin. The library notes that at trace level civet makes white floral notes carry further and last longer without showing as a separate smell. The pairing of jasmine and musk in many perfumes today descends from that use.

The replacement in the laboratory

A civet reconstitution is not a single substance but a compound. At its centre is usually synthetic civetone or another macrocyclic musk. Around it sit tiny amounts of skatole, indole and p-cresol derivatives, sometimes with plant materials carrying animalic or leathery notes. Major fragrance suppliers all have their own civet bases, with undisclosed formulas.

The library describes the reconstitution as animalic, warm, faintly faecal and skin like; diluted, a soft musk, white flower and waxy side appears. Reconstitutions are usually cleaner than true civet, with less harsh foulness. True civet varies with the lot, the ageing time and the tincture strength; a reconstitution gives a more consistent smell from lot to lot.

Being a compound, a reconstitution has no IFRA standard of its own; each component is regulated separately. p-Cresol has been under an IFRA restriction standard since 2023. Costus root oil, once used for animalic notes, has been prohibited by IFRA since 2006. Cumin oil has been restricted since 2020. Suppliers should provide an IFRA conformity certificate for each base.

The reasons for using a reconstitution are recorded in the library in three words: animal welfare, supply stability, regulation. With castoreum, another animal material, the story has moved in the same direction, as the piece castoreum, the smell of leather before leather records.

An animal smell without the animal

A molecule does not know where it came from. Civetone in a gland secretion and civetone in a reaction vessel are the same structure, the same seventeen membered ring, the same smell. What changes is not the scent but the path that makes it.

This does not mean a reconstitution is identical to true civet. The crude secretion holds many substances, many fatty acids among them, and that mixture shifts with each animal, each lot, each month of ageing. A synthetic base selects the most important molecules and leaves the rest behind. It is cleaner, more even, and perhaps a little flatter.

For most of perfumery today, however, that trade is acceptable. What civet once did for a bouquet of white flowers, warming it, extending it, drawing the floral scent close to skin, can be done with civetone, a trace of indole and a macrocyclic musk. No cage, no animal.

In the Lê Mai cabinet, white jasmine and musk are a familiar pair. That pair carries a long history of animal materials, yet today it can stand on its own without any civet at all.

The smell lives in the molecule, not in the animal.

A seventeen membered ring can be made anywhere.

An ethical question is sometimes answered by a chemical formula.