Basic information Safety Supplier Related

Direct Black 56

Basic information Safety Supplier Related

Direct Black 56 Basic information

Product Name:
Direct Black 56
Synonyms:
  • Direct Black 56
  • Direct Fast Greay RLN
  • Direct black 56 (C.I. 34170)
  • Grey LBN
  • 2-Naphthalenesulfonic acid, 5 (or 8)-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-8(or 5)-[[4-(phenylazo)-6(or 7)-sulfo-1-naphthalenyl]azo], trisodium salt
  • Atul Direct Light Fast Grey BR
  • Dinamine Fast Grey BR
  • Direct Fast Black LBN
CAS:
8003-57-4
MF:
C36H22N7Na3O10S3
MW:
877.76509
Mol File:
8003-57-4.mol
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Direct Black 56 Usage And Synthesis

Preparation

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.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 3 4 4-5 3 2
AATCC 3 5 5-6 3 4

Direct Black 56 Preparation Products And Raw materials

Raw materials

Direct Black 56Supplier

Shanghai Orgchem Co.,Ltd.
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+86-21-5877 1921
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info@chemofchina.com
Hefei TNJ Chemical Industry Co.,Ltd.
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+86-0551-65418671 +8618949823763
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sales@tnjchem.com
AFINE CHEMICALS LIMITED
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+86-0571-85134551
Email
sales@afinechem.com
Hubei Lidu New Material Technology Co., Ltd.
Tel
19307245857
Email
1931978409@qq.com
Shaanxi Xihua Chemical Industry Co., Ltd
Tel
17691182729 15529505138
Email
1021@dideu.com