dye|World dye variety

Name:C.I.Direct Black 2,C.I.31575

Molecular Structure: trisazo class

C.I.Direct Black 2,C.I.31575,CAS 8003-65-4,784.73,C34H26N8Na2O8S2

Molecular Formula:C₃₄H₂₆N₈Na₂O₈S₂

Molecular Weight: 784.73

CAS Registry Number:8003-65-4

Manufacturing Methods : N-(4-aminophenyl)acetamide diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid, amino, acylation coupled hydrolysis again diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid , its product to three diazo, and 2-(3-Aminophenylamino)ethanol coupling.

Properties and Applications: black. Blue gray powder, soluble in water for violet black, soluble in ethanol and soluble fiber element. The strong sulfuric acid in blue, diluted red for purple; In nitric acid for brown in the light purple. The dye solution to join strong hydrochloric acid for red light purple; Add thick sodium hydroxide solution for purplish red color. Mainly used for dyeing cotton and glue, can also be used for leather and pulp dyeing.

List of Suppliers: