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Pigment Blue 57

Catalog Number DYE-PIG-0287
CAS Number 5905-38-4
Structure
Synonyms Reflex Blue RB
Molecular Weight 367.79
Molecular Formula C40H35N3O3S
CI Number C.I.42795
Color red light blue.
Main Molecular Structure triarylmethane
Preparation Method in the presence of Benzoic acid, C.I.Basic Red 9 (C.I. 42500) and too much O-Methylaniline
in 180 ~ 185 ℃ heating under 1.5 ~ 2 hours, and concentrated sulfuric acid sulfonate.

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