Chromate(3-), bis[2-(hydroxy-κO)-5-[(4-sulfo-1-naphthalenyl)azo]benzoato(3-)-κO]-, trisodium, (T-4)-

CAS NO.：6421-61-0
Empirical Formula: C34H18CrN4NaO12S2(-2)
Molecular Weight: 813.64
EINECS: 613-508-8

What is Chromate(3-), bis[2-(hydroxy-κO)-5-[(4-sulfo-1-naphthalenyl)azo]benzoato(3-)-κO]-, trisodium, (T-4)-?

Preparation

4-Aminonaphthalene-1-sulfonic acid diazo, coupled with 2-Hydroxybenzoic acid?and then translate into chromium complex.

Properties and Applications

red light yellow. Soluble in water for green light yellow, slightly soluble in ethanol for green light yellow. The strong sulfuric acid for product red, diluted into yellow. Its water solution to join strong hydrochloric acid for yellow; Add thick sodium hydroxide solution for yellow light brown.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
Standard	Light Fastness	Fading	Stain	Persperation Fastness	Fading	Stain	Fading	Stain
ISO	5	4		4-5			4-5

Safety information for Chromate(3-), bis[2-(hydroxy-κO)-5-[(4-sulfo-1-naphthalenyl)azo]benzoato(3-)-κO]-, trisodium, (T-4)-

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