dye|World dye variety

Name:C.I.Direct Black 56,C.I.34170

Molecular Structure: trisazo class

C.I.Direct Black 56,C.I.34170,CAS 8003-57-4,877.77,C36H22N7Na3O10S3,Direct Black Grey RLN,Direct Grey RLN,Direct Fast Grey LBN

Molecular Formula:C₃₆H₂₂N₇Na₃O₁₀S₃

Molecular Weight: 877.77

CAS Registry Number:8003-57-4

Manufacturing Methods : aniline diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, again diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, product to diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid  coupling.

Properties and Applications: red light grey. Gray powder. Soluble in water for dark purple, not soluble in alcohol. The strong sulfuric acid in the green light for gray blue, diluted into purple. The dye solution to join strong hydrochloric acid have precipitation of dark; Add thick, hydrogen oxidation solution have dark purple precipitation. Cellulose fiber of dyeing, the dye well after sex is good, in the 80 ℃ temperature when the biggest affinity. Discharge sex is good, hard to sensitive. For the red light gray color. Dye in bath of copper, iron ion colored light basic unchanged, the SDC classification for a class B. Neutral and alkaline white are 5 levels. Mainly used for cotton, linen, silk, cellulose fiber fabrics such as glue the dyeing. Can also be used for leather, paper all the dyeing.

List of Suppliers:

Tianjin Yadong Group

Atul Direct Light Fast Grey BR ( Atul Limited )

Black TBRN(Sinochem Liaoning Import & Export Corporation)

Dinamine Fast Grey BR (Dintex Dyechem Ltd)

Direct Black Grey RLN ( Sharda International )

Direct Fast Black LBN (Sinochem Ningbo Imp & Exp Corp)

Direct Fast Grey LBN ( Sinochem Tianjin Imp Exp Corp )

Direct Fast Grey LBN (Shandong Qing Shun Chemical Co., Ltd.)

Direct Grey RLN ( Colour Industries )

Direct Grey RLN ( National Dyechem Industries )

Direct Grey RLN ( Jagson Colorchem Ltd )

Hispaluz Grey BR ( S A Robama )

Saturn Grey LRN ( SBU Pigments and Dyes )

Solius Grey 2R ( Frado )

Vicorect Black MB(Victory Colour Chem Industries)