... in competitive price 2. Quality Guaranteed 3. Fast delivery 4. Financial credit support It is used on the skin ( ... : Vitamin A acid CAS. NO.: 302-79-4 Chemical name: 3, 7-dimethly-9-(2, 6-trimethly-1-cylohexane)-2 ... , 4, 6, 8-pelartetaenoic acid Character: Yellow acicular crystals, ... 300.44 Tretinoin, Isotretinoin & Acitretion,Retinoic Acid, 302-79-4