2-Naphthalenesulfonic acid, 4-hydroxy-3-[(2-methoxyphenyl)azo]-6-[(2-sulfoethyl)amino]-, disodium salt

CAS NO.：6417-27-2
Empirical Formula: C19H17N3Na2O8S2
Molecular Weight: 525.46312
EINECS: 613-491-7

What is 2-Naphthalenesulfonic acid, 4-hydroxy-3-[(2-methoxyphenyl)azo]-6-[(2-sulfoethyl)amino]-, disodium salt?

Preparation

O-Anisidine diazo, in alkaline conditions and 4-Hydroxy-6-(2-sulfoethylamino)naphthalene-2-sulfonic acid?coupling.

Properties and Applications

Dark time Soluble in water for red brown, the solubility in ethanol is very small. The strong sulfuric acid for purple, diluted into pink. In water solution to join strong hydrochloric acid is palm orange; Add thick sodium hydroxide solution by red to product red.

Safety information for 2-Naphthalenesulfonic acid, 4-hydroxy-3-[(2-methoxyphenyl)azo]-6-[(2-sulfoethyl)amino]-, disodium salt

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disodium 4-hydroxy-6-(phenylamino)-3-[(4-sulphonatophenyl)azo]naphthalene-2-sulphonate