Costus root oil has a powerful, dense animalic-woody character — dry, dusty, and distinctly reminiscent of old goat hair, unwashed wool, or worn leather. Underneath the animalic top lies a warm, earthy-woody base with faint sweet-musky facets that persist for days on a blotter. Now IFRA-banned for skin use due to strong sensitisation, but historically prized as a fixative in chypres and orientals.AI · claude-opus-4-7
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