tretinoin cas number:302-79-4 quantity standard:usp32 TretinoinChemical name : vitamin A acid; all-trans-retinoic acid; (all-E)-3,7-Dimethyl-9 ... -(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6 ... ,8-nonatetraenoic acid; C A S : 302-79-4 Quality Standard : USP27Package 1,2,5kg ...