3,3'-[1,1'-Biphenyl-4,4'-diylbis(azo)]bis(6-amino-4-hydroxynaphthalene-2-sulfonic acid sodium) salt

CAS NO.：3626-23-1
Empirical Formula: C32H22N6Na2O8S2
Molecular Weight: 728.66202
Update Date: 2024-12-18 14:08:52

What is 3,3'-[1,1'-Biphenyl-4,4'-diylbis(azo)]bis(6-amino-4-hydroxynaphthalene-2-sulfonic acid sodium) salt?

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? (2 Moore) coupled.

Properties and Applications

blue ash. Soluble in water (for violet black) and soluble fiber element, slightly soluble in ethanol is shallow purple, insoluble in other organic solvents. The strong sulfuric acid in blue, diluted for purple, have precipitation. The dye solution to join strong hydrochloric acid for dark, precipitation; Add thick sodium hydroxide solution for purplish red color, have precipitation.

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

Properties of 3,3'-[1,1'-Biphenyl-4,4'-diylbis(azo)]bis(6-amino-4-hydroxynaphthalene-2-sulfonic acid sodium) salt

EPA Substance Registry System

C.I. Direct Black 29 (3626-23-1)

Safety information for 3,3'-[1,1'-Biphenyl-4,4'-diylbis(azo)]bis(6-amino-4-hydroxynaphthalene-2-sulfonic acid sodium) salt

Computed Descriptors for 3,3'-[1,1'-Biphenyl-4,4'-diylbis(azo)]bis(6-amino-4-hydroxynaphthalene-2-sulfonic acid sodium) salt

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Direct Black 24

4-Amino-3,6-bis[[4-[(2,4-diamino-5-methylphenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt

4-Amino-6-[(4-aminophenyl)azo]-3-[[4'-[[5-[(4-aminophenyl)azo]-2,4-diaminophenyl]azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt

6-Amino-4-hydroxy-3-[[4-(phenylazo)-1-naphtyl]azo]-2-naphthalenesulfonic acid sodium salt

2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-[[4'-[[4-hydroxy-2-(phenylamino)phenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-, disodium salt

Direct Black 27

Direct Black 22:1

2-Naphthalenesulfonic acid, 6-(2,4-diaminophenyl)azo-3-4-(2,4-diaminophenyl)azo-3-sulfophenylazo-4-hydroxy-, disodium salt