sodium 6-hydroxy-5-[(2-hydroxy-5-nitrophenyl)azo]naphthalene-2-sulphonate

CAS NO.：3624-64-4
Empirical Formula: C16H10N3NaO7S
Molecular Weight: 411.32127
EINECS: 222-827-8

What is sodium 6-hydroxy-5-[(2-hydroxy-5-nitrophenyl)azo]naphthalene-2-sulphonate?

Preparation

2-Amino-4-nitrophenol diazotization, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

blue light red. Soluble in water for orange brown, right amount soluble in ethanol. In concentrated sulfuric acid for red, to orange after diluted. Dye aqueous solution to join concentrated hydrochloric acid for orange; With strong caustic for orange brown.

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

Safety information for sodium 6-hydroxy-5-[(2-hydroxy-5-nitrophenyl)azo]naphthalene-2-sulphonate

New Products

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