dye|World dye variety

Name:C.I.Direct Violet 40,C.I.27900

Molecular Structure: Double azo class

C.I.Direct Violet 40,C.I.27900,CAS 6227-17-4,705.67,C31H25N5Na2O8S2

Molecular Formula:C₃₁H₂₅N₅Na₂O₈S₂

Molecular Weight: 705.67

CAS Registry Number:6227-17-4

Manufacturing Methods :  2-Amino-5-methylbenzenesulfonic acid diazo, and 2-Amino-4-methylanisole coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.

Properties and Applications: blue purple. Soluble in water and ethanol, slightly soluble in acetone. The strong sulfuric acid solution for blue-ray green; In nitric acid solution for orange brown. Add sodium hydroxide solution for purple dye.

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