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Pigment Red 51

Catalog Number DYE-PIG-0474
CAS Number 5850-87-3
Structure
Molecular Weight 342.37
Molecular Formula C17H14N2O4S
CI Number C.I.15580
Color yellow red
Lightfastness 4-5
Main Molecular Structure Single azo
Oleic Acid 3
Preparation Method 4-Amino-2-methylbenzetiesulfonic acid diazotization, and Naphthalen-2-ol coupling, and then convert it to barium salt.
Properties In concentrated sulfuric acid for wine red, dilution after big red precipitation, in concentrated nitric acid for wine solution; In concentrated sodium hydroxide solution for wine solution
Soap Micelle Bleeding 1

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