dye|World dye variety

Name:C.I.Direct Red 75,C.I.25380

Molecular Structure: Double azo class

C.I.Direct Red 75,C.I.25380,CAS 2829-43-8,990.80,C33H22N8Na4O15S4,Direct Fast Pink BK,Direct Pink BK, Pink 2BL,Bordeaux N2B,Pink 2B

Molecular Formula:C₃₃H₂₂N₈Na₄O₁₅S₄

Molecular Weight: 990.80

CAS Registry Number:2829-43-8

Manufacturing Methods :  (a) 1,3-Bis(4-amino-3-sulfophenyl)urea double nitriding, in acid conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid  (2 Moore) coupled; (b) 2,5-Diaminobenzenesulfonic acid diazo, in acid conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, and then will the nitro reduction, and will get the azo dyes in the amino light gasification.

Properties and Applications: bright blue light pink. Soluble in water for product red, solubility of 35 g/L (60 ℃), 42 g/L (97 ℃), slightly soluble in soluble fiber element, soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid for Gray light blue, diluted for purple; Partly dissolved in nitric acid to black. The dye solution to join strong hydrochloric acid for purple, have precipitation; Add thick sodium hydroxide solution for red, have precipitation. In dyeing copper and iron ion colored light slight change. General for viscose fiber or with the silk that the fabric dyeing and printing directly. Can also be used for silk, wool and polyamide fiber dyeing and printing. But with high temperature dispersal dyes with bath dyeing polyester/cotton blended fabric, also used in leather and paper color.

List of Suppliers:

Direct Fast Pink BK,Direct Pink BK

Tianjin Yadong Group

ABCOL Fast Pink 2BL ( Abbey Color Inc. )

ACDI Fast Pink 2BL(Aakash Chemicals & Dyestuffs Inc)

Direct Fast Pink 2BL( Global Colors Inc. )

Dyrect Pink BK( Albion Colours Ltd)

Helion Pink 2B ( Ciech SA )

Lecotan Bordeaux N2B ( Jinwoong Industrial Co Ltd )

Mordirect Pink 2BL (Classic Dyestuffs Inc)

Orcolitefast Pink 2BL ( Organic Dyestuffs Corp )

Red BK(Hangzhou Dikai Chemical Co Ltd)

Solius Pink 2B( Frado )