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Blue No.403
Legal color:Blue No.403  
General name:Sudan Blue B   
Class:Solvent Dye
FDA :  
CI #:C.I. 61520
Color #:Solv. Blue 63
CAS #:6408-50-0
CAS :9,10-Anthracenedione,1-(methylamino)-4-[(3-methylphenyl)amino]-
IUPAC:→1;1-Methylamino-4-(3-methylphenylamino)anthraquinone
→2;1-Methylamino-4-(m-toluidino)anthraquinone
→3;4-Methylamino-1-(m-toluidino)anthraquinone
Chemical structure :

Sudan Blue B