Acid Orange 7
CAS: 633-96-5
Molecular Formula: C16H11N2NaO4S
Molecular Weight: 350.3243
Product description:Yellow powder. Soluble in water show red light yellow, to join the hydrochloric acid to produce tan precipitation; Dark brown in sodium hydroxide solution. Soluble in ethanol orange; In concentrated sulfuric acid in magenta, diluted produce tan precipitation; In nitric acid are golden. Insoluble in the concentrated sodium hydroxide solution. When dyeing with copper ion turn red and dark; Iron ions in light and dark color.Mainly used for dyeing wool, silk, polyamide fiber and its fabric printed directly, bright color and good levelness, but poor fastness. Also used in leather, paper and biological products coloring, single product can be used as edible pigment, also can be used as indicator. With acid Black 10 b (C.I.A cid Black 1) blending of acid Black ATT.
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