dye|World dye variety

Name:C.I.Food Red 4,C.I.16045

Molecular Structure: Single azo class

C.I.Food Red 4,C.I.16045,CAS 2302-96-7,502.43,C20H12N2Na2O7S2

Molecular Formula:C₂₀H₁₂N₂Na₂O₇S₂

Molecular Weight: 502.43

CAS Registry Number:2302-96-7

Manufacturing Methods : 4-Hydroxynaphthalene-1-sulfonic acid diazo, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: red. Soluble in water is cherry red, in the water solubility of 1.4 g/100 ml; Slightly soluble in ethanol to root for the red light purple brown, insoluble in vegetable oil, soluble in acetone. In the purple for sulfuric acid, diluted cherry red and orange for precipitation; In nitric acid for yellow in red. Its water solution and strong hydrochloric acid for red orange brown; Add thick hydrogen uranium oxide solution for orange brown. Resistance to fruit acid and benzoic acid, can also do acid dye. And C.I. Acid red 13 the same chemical structure.

List of Suppliers:

Daiwa Fast Red E( Kaseihin Kogyo Kyokai )

Fast Red E( Hickson & Dadajee Ltd )

Fast Red E( Sharda International )

Fast Red E( Bhavi International Ltd )

Fast Red E Supra( Hickson & Dadajee Ltd )

Neeliool Fast Red E( Neelikon Food Dyes and Chemicals Ltd )

Raincol Tartrazine( Rainbow Dye-Tech (Pvt) Ltd )