Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-5-methylphenyl)azo]-5-nitro-, monosodium salt

CAS NO.：6408-98-6
Empirical Formula: C13H11N3O7S.Na
Molecular Weight: 376.3
EINECS: 613-458-7

What is Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-5-methylphenyl)azo]-5-nitro-, monosodium salt?

Preparation

3-Amino-4-hydroxy-5-nitrobenzenesulfonic acid diazotization, and p-Cresol coupling.

Properties and Applications

dark brown. Soluble in water for yellow brown, right amount soluble in ethanol. In concentrated sulfuric acid for yellow brown, dilution for shallow orange. Dye aqueous solution to join concentrated hydrochloric acid for orange; Join concentrated sodium hydroxide solution for orange brown.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
Standard	Ironing Fastness	Light Fastness	Alkali	Acid	Persperation Fastness	Soaping	Water
ISO	4	5-6	3-4	3	5	4
AATCC	4	6	4		5	4

Safety information for Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-5-methylphenyl)azo]-5-nitro-, monosodium salt

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