coloring chemical pigments

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Fast Red 4821

Fast Red 4821
Chemical Name:  Calcium Red 2B,Permanent Red BB 
CAS No.: 7023-61-2
EU No.:  230-303-5
C.I. NO.:  15865:2
Chemical Formula:  C18H11CLN2O6SCa
Molecular Weight:  458.90

Structural Formula: