Pigment Red 57: 1
Synonyms: C. I. Pigment Red 57: 1
C. I. 15850: 1
3-Hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2
-naphthalenecarboxylic acid calcium salt (1: 1)

1. Product Name
Trade Name: Fast Rubine BK-W

C. I. Number: Pigment Red 57: 1
CAS Number: 5281-04-9
EU Number: 226-109-5
Chemical Family: Mono azo

2. Physical, Chemical and Fastness Properties
Molecular Weight: 424.46
Molecular Formula: C18H12N2O6SCa
P. H. Value: 7.0-8.0
Density: 1.7
Oil Absorption (ml/100g)%: 45-55