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Pigment Blue 56

Catalog Number DYE-PIG-0288
CAS Number 6417-46-5
Structure
Synonyms Reflex Blue A4H-3G 31, Reflex Blue A5H-G, Reflex Blue A6H-G, Reflex Blue GG
Molecular Weight 637.79
Molecular Formula C40H35N3O3S
CI Number C.I.42800
Color green 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 m-Toluidine in 180 ~ 185 ℃ heating under 1.5 ~ 2 hours, and 90% sulfuric acid sulfonate.

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