Vat Red 1 (CAS: 2379-74-0)

Vat Red 1 is a kind of Peach powder.

physico-chemical property:Hue and color, Colourful Huang Guanggong

Insoluble in water, ethanol, acetone, soluble in xylene, four hydrogen naphthalene.

In concentrated sulfuric acid red, after turn into green. Red in dilute sulphuric acid. Red in nitric acid. In alkaline solution of rongalite yellow. In the acidic fluid colorless.

Application

The pigment is thioindigo VAT dye varieties of organic pigments, specialized for polystyrene polymer and similar color, under the high temperature polymer processing medium, can dissolve in the shaded when given bright blue light red, and it has good light fastness. Another important use is as cosmetics, such as toothpaste, coloring, was identified as the medicine in the United States cosmetics red No. 30, for medicine and cosmetics in Japan No. 226. There are 13 kinds of market trade names.

Production methodprocess

Using o-toluidine as raw material, after curing, alkaline hydrolysis, and chloroacetic acid condensation, again by diazotization, cyanide, alkaline hydrolysis, cyclization, acid hydrolysis, oxidation products.By filtering, crushing, drying to finished products.