2-Naphthalenesulfonic acid, 8,8'-[carbonylbis[imino(2-sulfo-4,1-phenylene)azo]]bis[7-(methylamino)-, tetrasodium salt

CAS NO.：6772-28-7
Empirical Formula: C35H31N8NaO13S4
Molecular Weight: 922.91
EINECS: 614-113-3

What is 2-Naphthalenesulfonic acid, 8,8'-[carbonylbis[imino(2-sulfo-4,1-phenylene)azo]]bis[7-(methylamino)-, tetrasodium salt?

Preparation

1,3-Bis(4-amino-3-sulfophenyl)urea double nitriding, and 7-Aminonaphthalene-2-sulfonic acid?(2 Moore) coupled.

Properties and Applications

blue light pink. Soluble in water for red, slightly soluble in ethanol is palm red light product. The strong sulfuric acid for orange red brown, diluted purple for grey brown. The dye solution to join strong hydrochloric acid for brown, have precipitation; Add thick sodium hydroxide solution for product red

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	5	3	1		1

Safety information for 2-Naphthalenesulfonic acid, 8,8'-[carbonylbis[imino(2-sulfo-4,1-phenylene)azo]]bis[7-(methylamino)-, tetrasodium salt

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Related products of tetrahydrofuran

1,6-Naphthalenedisulfonic acid, 8-hydroxy-7-[[4-(6-methyl-2-benzothiazolyl)phenyl]azo]-, disodium salt

2-Hydroxy-5-[[4'-[(1,6-dihydroxy-3-sodiosulfo-2-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid sodium salt

GERANINE G

7-Amino-4-hydroxy-3-[[4'-[(4-hydroxy-2-sodiosulfophenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2-sulfonic acid sodium salt

1,6-Naphthalenedisulfonic acid, 7-[[4-(4,6-dimethyl-2-benzothiazolyl)-2-methylphenyl]azo]-8-hydroxy-, disodium salt

Direct Red 45

2-Naphthalenesulfonic acid, 7-[(2,4-dihydroxyphenyl)azo]-3-[[3-[(2,4-dihydroxyphenyl)azo]phenyl]azo]-4-hydroxy-, monosodium salt

disodium 8,8'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(7-hydroxynaphthalene-1-sulphonate)