Chromate(2-), hydroxy[3-(hydroxy-κO)-4-[[1-(hydroxy-κO)-8-sulfo-2-naphthalenyl]azo-κN1]-7-nitro-1-naphthalenesulfonato(4-)]-, disodium, (T-4)-

CAS NO.：6370-09-8
Empirical Formula: C20H9CrN3NaO11S2-
Molecular Weight: 606.41
EINECS: 613-326-9

What is Chromate(2-), hydroxy[3-(hydroxy-κO)-4-[[1-(hydroxy-κO)-8-sulfo-2-naphthalenyl]azo-κN1]-7-nitro-1-naphthalenesulfonato(4-)]-, disodium, (T-4)-?

Preparation

4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazo, and 8hydroxynaphthalene-1-sulfonic acid coupling, and then with aqueous acid chromium common heating (125 ℃), make dye create chromium complex.

Properties and Applications

green and black. Soluble in water for purple, slightly soluble in alcohol. The strong sulfuric acid for blue to gray, for pink to purple diluted. The dye solution to join strong hydrochloric acid for product red, add thick sodium hydroxide solution for red light blue

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
Standard	Light Fastness	Fading	Stain	Persperation Fastness	Fading	Stain	Fading	Stain
ISO	6-7	4	4	3-4	2		4

Safety information for Chromate(2-), hydroxy[3-(hydroxy-κO)-4-[[1-(hydroxy-κO)-8-sulfo-2-naphthalenyl]azo-κN1]-7-nitro-1-naphthalenesulfonato(4-)]-, disodium, (T-4)-

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