1-(1,2,3,4,5,6,7,8-Octahydro-2,3,8,8-tetramethyl-2-naphthalenyl)ethan-1-one

Iso E Super (IUPAC: 1-(1,2,3,8,8-tetramethyl-2-naphthalenyl)ethan-1-one) is a synthetic woody-amber musks molecule developed by International Flavors & Fragrances (IFF) in the 1970s, characterized by its distinctive cedarwood, amber, and slightly spicy-woody olfactory profile. It is uniquely prized in perfumery for its 'skin-like' quality and remarkable ability to amplify and enhance other fragrance notes, acting as a booster that adds diffusion and radiance to a composition even at low concentrations. Formulators favor it for its versatility across fine fragrances, hair care, and skin care products, where it imparts a warm, sensual depth while also functioning as a fixative to improve fragrance longevity.