Acid Yellow 200 Chemical Name Acid Yellow 200 C.I. No. 18930 CAS No. 6359-95-1 Synonyms Acid Yellow RG, Ricoamide Yellow RG, Stylacyl Yellow RG, Stylacyl Yellow RG, Supramine Yellow S Molecular Formula C20H13ClN4Na2O7S2 Molecular Weight 566.9