This document is a risk assessment of 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta--2-benzopyran (HHCB). HHCB is one of the most widely used polycyclic musk fragrance ingredients in a range of consumer products including perfumes, cosmetics, shampoos, lotions, detergents, fabric softeners, and household cleaners. HHCB is not produced in the US, but is imported.

• TSCA Work Plan Chemical Risk Assessment HHCB 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta-g-2- benzopyran Risk Assessment (PDF)(136 pp, 1 MB, August, 2014)