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Pigment Blue 18

Catalog Number DYE-PIG-0296
CAS Number 1324-77-2
Molecular Weight 697.76
Molecular Formula C37H28N3NaO6S2
CI Number C.I.42770:1
Color brilliant blue to red light navy blue.
Lightfastness GeneralGood
Main Molecular Structure triarylmethane
Oleic Acid Well
Preparation Method C.I.Solvent Blue 23 (C.I. 42760) two sulfonated and changed into free acid derivatives.
Properties Soluble in water is blue, soluble in ethanol for green light blue. In concentrated sulfuric acid for the red light brown, dilution for blue, purple and blue light precipitation.
Soap Micelle Bleeding Slightly

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