[2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2-hydroxy-6-sulfo-1-naphthalenyl)azo]phenyl]-6-methyl-, disodium salt

CAS NO.：5858-98-0
Empirical Formula: C31H18N4Na2O7S4
Molecular Weight: 732.73676
EINECS: 611-715-8

What is [2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2-hydroxy-6-sulfo-1-naphthalenyl)azo]phenyl]-6-methyl-, disodium salt?

Preparation

p-Methylaniline (2 Moore) and sulfur (4.5 atomic ratio) in 200 ~ 280 ° C heat, with hair smoke from the sulphonated sulfuric acid alkali primrose spirit. The product diazo, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

yellow light pink to red yellow light. Soluble in water for orange red. The strong sulfuric acid for blood-red, after diluted orange precipitation. The dye solution to join strong hydrochloric acid have orange precipitation; Add thick dark sodium hydroxide solution.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	4		1-2	2-3		1

Safety information for [2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2-hydroxy-6-sulfo-1-naphthalenyl)azo]phenyl]-6-methyl-, disodium salt

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