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Pigment Yellow 93

Pigment Yellow 93

 

Refractive index: 1.667

Flash: DHS 501.7 C

Density: 1.45 g/cm3

Boiling point: 905.9 C at 760mmHg

 

Diazo was performed on 2mol of 4-chloro-3-aminobenzoic acid, and the diazo salt was coupled with 1mol of 2-methyl-5-chloro-1, 4-diacetyl acetaminobenzene to prepare diazo dye in the medium of o-dichlorobenzene (containing a small amount of DMF). Reaction with sulfoxide chloride was carried out to prepare products containing carboxylic chloride, and condensation reaction with 3-chloro-2-methyl-aniline in o-dichlorobenzene (in the presence of a small amount of pyridine) was carried out. Pigment yellow 93 C.I. was prepared by pigmentation of the crude pigment.

 

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