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Pigment Red 66

Catalog Number DYE-PIG-0451
CAS Number 1325-19-5
Structure
Synonyms Anthosin 3B Barium Toner
Molecular Weight 541.56
Molecular Formula C24H19N3O8S2
CI Number C.I.18000:1
Color brilliant red.
Lightfastness Well
Main Molecular Structure Single azo
Oleic Acid Insoluble
Preparation Method m-Toluidine diazotization, and 4-Benzamido-5-hydroxynaphthalene-1,7-disulfonic acid coupling, and then translate into barium salt.
Properties Soluble in water for red, moderate soluble in ethanol for magenta. In concentrated sulfuric acid for magenta, dilution after pink. Aqueous solution to join concentrated hydrochloric acid for magenta; Join concentrated sodium hydroxide solution for orange brown.
Soap Micelle Bleeding Slightly

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