Odorant and powdery violet
Alpha-Isomethyl Ionone (or Methyl Ionone) is a colorless fragrance material with a powdery, woody and floral scent, very similar to violet and orris.
Alpha-Isomethyl Ionone is a safe synthetic compound used a lot in cosmetic to fragrance by reproducing the smell of violets, with a sweet and powdery touch.
Ionones were discovered by Tiemann in 1893, changing the face of perfumery by giving an alternative to very rare, unaffordable or volatile flower oils. They are now used in different forms, including Alpha-Isomethyl, in almost every fragrance.