Galaxolide (trade name; also known as Abbalide, Pearlide, Astrolide, Musk 50, Polarlide; common chemical name 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8,-hexamethyl-cyclopenta[g]benzopyran or HHCB) is a synthetic ingredient with a clean sweet musky floral woody odor used in fragrances.