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Direct Brown 57

Direct Brown 57 Structure
Direct Brown 57 structure
CAS No.
Chemical Name:
Direct Brown 57
Synonyms
Direct Brown 57;C.I.Direct Brown 57:C.I.31705
CBNumber:
CB99702964
Molecular Formula:
Molecular Weight:
0
MDL Number:
MOL File:
Mol file
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Direct Brown 57 Chemical Properties,Uses,Production

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? coupling, its product to diazo, and Benzene-1,3-diamine coupling.

Properties and Applications

dark red light brown. Soluble in water for dark red light brown, soluble in ethanol and soluble fiber element, slightly soluble in acetone, insoluble in other organic solvents. The strong sulfuric acid as dark blue light in purple, dilute red after brown precipitation; In 10% of sulfuric acid for blue-ray gray. The dye solution to join 10% sodium hydroxide solution for purplish red color.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 4 1 1-2 2
AATCC 5 5 2 2 2

Direct Brown 57 Preparation Products And Raw materials

Raw materials

Salicylic acid 6-Amino-4-hydroxy-2-naphthalenesulfonic acid Benzidine m-Phenylenediamine

Preparation Products

(Direct Brown 57)Related Search:

6-Amino-4-hydroxy-3-[[4'-[(2,4-diaminophenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2-sulfonic acid sodium salt disodium 5-[[4'-[[4-[(4-hydroxyphenyl)azo]-6(or 7)-sulphonato-1-naphthyl]azo][1,1'-biphenyl]-4-yl]azo]salicylate DIRECT BROWN 6 Benzoic acid, 5-[[4'-[[7-(dimethylamino)-1-hydroxy-3-sulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt DIRECT BROWN 59
Direct Brown 61 Benzoic acid, 5-[[4'-[(2-amino-3-hydroxy-6-sulfo-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt [2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2,4-diamino-5-methylphenyl)azo]phenyl]-6-methyl-, monosodium salt C.I. Direct brown 62

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Direct Brown 57 C.I.Direct Brown 57:C.I.31705