Castoreum is a secretion from the scent glands of beavers, historically used in perfumery for leathery, animalic depth — but it has become genuinely rare in modern fragrances, with most brands having moved away from it decades ago for ethical, cost and supply reasons in favour of synthetic alternatives.

Why it’s largely a historical ingredient now

Castoreum was once valued for the warm, slightly animalic and leathery quality it added to classic perfumes, particularly older leather and oriental compositions. Sourcing it ethically and consistently at commercial scale became increasingly impractical, and synthetic materials have long since been developed that replicate its effect closely enough that there’s little commercial reason to use the real thing anymore. You’ll still find it referenced in discussions of vintage or historic formulas, but it’s very much the exception rather than the rule in anything made today.

  • Historically used for leathery, animalic depth in perfumery
  • Ethical, cost and supply concerns pushed the industry toward synthetics
  • Rare in modern fragrance, mostly referenced in vintage or historic formulas

You may still see ‘castoreum’ listed as a flavour note in fragrance descriptions occasionally, but this is now almost always describing a synthetic recreation of the effect rather than the genuine animal-derived material itself.

Our guide to perfume ingredients and our complete guide to perfume cover this and other animal-derived materials honestly.