Direct violet 56 (C.I. 17510)

CAS NO.：6408-20-4
Empirical Formula: C22H13CuN3NaO8S2-
Molecular Weight: 598.02

What is Direct violet 56 (C.I. 17510)?

Preparation

3-Amino-4-hydroxybenzenesulfonic acid?diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling, and then into copper complex.

Properties and Applications

purple. Soluble in water, slightly soluble in alcohol. In strong hydrochloric acid for big red; In the thick of sodium hydroxide solution for orange.

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C.I. Direct Violet 49

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