Eriochrome Black A Chemical Properties

Colour Index 

15710

form 

powder to crystal

color 

Red to Dark blue to Black

EPA Substance Registry System

1-Naphthalenesulfonic acid, 3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-7-nitro-, monosodium salt (3618-58-4)

Eriochrome Black A Usage And Synthesis

Preparation

4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazotization, and Naphthalen-2-ol coupling.

Properties and Applications

blue light gray to black. Black powder. Soluble in water for navy blue, in the water solubility 60 g/l (80 ℃), slightly soluble in ethanol and Acetone. In concentrated sulfuric acid for blue, yellow after diluted into light brown; In concentrated nitric acid for red orange. Its aqueous solution for navy blue, join concentrated hydrochloric acid to pale yellow light brown; Join strong caustic into orange brown. Dyeing wool in nitric acid into black light purple, and have a slight white streaks. Mainly used for wool fabric dyeing, also can be used for silk and nylon dyeing, also can be used for wool and a variety of fiber blended fabric dyeing, can be in acetic acid chromium pretreatment of wool fabric direct printing. Also used in the leather dyeing.

Eriochrome Black A(3618-58-4)Related Product Information

• 1-Amino-2-naphthol-4-sulfonic acid
• ACID RED 88
• ACID BLACK 52
• Eriochrome Black A
• Sodium 4-amino-1-naphthalenesulfonate
• Sodium 1-amine-2-naphthol-4-sulfonate
• Mordant Black 17
• 2,2'-DIHYDROXYAZOBENZENE
• 2-NAPHTHYLAMINE-8-SULFONIC ACID
• 1,1'-AZONAPHTHALENE
• Naphthionic acid
• 2-NITRONAPHTHALENE
• Acid Orange 7
• Eriochrome Black T
• ERIOCHROME BLACK PV
• Eriochrome Black T, 0.5% (w/v) Solution in Triethanolamine Eluant Solution
• Eriochrome Black T Reagent
• ERIOCHROME BLACK T FOR COMPLEXOMETRY