... CAS# 84380-01-8. INCI Name: Alpha-arbutin. Properties: Alpha-Arbutin blocks epidermal melanin biosynthesis by inhibiting enzymatic oxidation ... ), ursolic acid (ursolic acid), arbutin (skin elasticity and compaction), also known as Arbutin, Arbutin, Bearberry leaf saponins, phenolic glycosides ... .Physical characteristics of the physical traits of the arbutin white needle crystal or powder, there are two ...