Product name:Acid Orange 7
CAS:633-96-5
Molecular Formula:C16H11N2NaO4S
Formula Weight:350.32
Specification:25g
Melting point:164 °C
Chemical property:Yellow Powder
Use:Used as indicator agent and a biological stain.
Description:Acid Orange 7 is a golden yellow powder. Soluble in water is red yellow, add hydrochloric acid to produce brownish yellow precipitation; Add sodium hydroxide solution to produce a dark brown. Soluble in ethanol is orange; It is magenta in concentrated sulfuric acid, and then produces brown-yellow precipitation after dilution. Golden yellow in concentrated nitric acid. It's insoluble in concentrated sodium hydroxide. When dyeing, copper ions turn red and dark; When iron ions light and dark color.
Acid Orange 7 is mainly used for dyeing silk, wool fabric, but also can be used for leather, paper dyeing. Polyamide can be dyed in formic acid bath. Acid Orange 7 can be printed directly on silk nylon, and can also be used as index agent and biological coloring.