2-Naphthalenesulfonic acid, 3,3'-[carbonylbis(imino-3,1-phenyleneazo)]bis[7-amino-4-hydroxy-, disodium salt

CAS NO.：6391-27-1
Empirical Formula: C33H27N8NaO9S2
Molecular Weight: 766.74
EINECS: 613-398-1

What is 2-Naphthalenesulfonic acid, 3,3'-[carbonylbis(imino-3,1-phenyleneazo)]bis[7-amino-4-hydroxy-, disodium salt?

Preparation

N,N’-bis(3-aminophenyl)urea double nitriding, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid (2 Moore) coupled.

Properties and Applications

Claret. Soluble in water for orange brown, soluble in ethanol for orange. In the strong sulfuric acid to red, shallow orange for diluted. The dye solution to join strong hydrochloric acid for red orange brown, have precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation; Add 10% sodium hydroxide solution color micro become yellow.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fading	Stain	Fading	Stain
ISO	4	5	1	4		3-4
AATCC	5	5	1-2	3		4

Safety information for 2-Naphthalenesulfonic acid, 3,3'-[carbonylbis(imino-3,1-phenyleneazo)]bis[7-amino-4-hydroxy-, disodium salt

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Related products of tetrahydrofuran

2-Naphthalenesulfonic acid, 7-[[[[4-(acetylamino)phenyl]amino]carbonyl]amino]-3-[[4-[(2,4-dichloro-6-sulfophenyl)azo]-3-methylphenyl]azo]-4-hydroxy-, disodium salt

DIRECT RED 111

disodium 7-[(4-aminobenzoyl)amino]-4-hydroxy-3-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate

trisodium 2-[4-[[6-[[[[4-(acetamido)phenyl]amino]carbonyl]amino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3-sulphonatophenyl]-6-methylbenzothiazole-7-sulphonate

Naphtho[2,1-d]thiazole-8-sulfonic acid, 2-(4-aminophenyl)-6-hydroxy-7-[(2-methylphenyl)azo]-, monosodium salt

DIRECT RED 122

C.I. Direct Red 112

sodium 7-[(3-aminobenzoyl)amino]-4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate