... additives Basic information:Kojic acidChemical name: 5-hydroxy-2-hydroxymethyl-1,4-pyroneCAS NO. : 501-30-4 EINECS ... microbial fermentation. 2). Kojic acid, (5-hydroxy-2-hydroxymethyl-1,4-pyrone, CAS: 501-30-4) is ... white crystal, 3). Kojic acid, (5-hydroxy-2-hydroxymethyl-1,4-pyrone, CAS: 501-30-4) is ... : (1) Cosmetics: Kojic acid, (5-hydroxy-2-hydroxymethyl-1,4-pyrone, CAS: 501-30-4) is used ...