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Pigment Red 40

Name:C.I.Pigment Red 40,C.I.12170

Molecular Structure: Single azo

C.I.Pigment Red 40,C.I.12170,CAS 2653-64-7,298.34,C20H14N2O,Autol Red RLP

C.I.Pigment Red 40,C.I.12170,CAS 2653-64-7,298.34,C20H14N2O,Autol Red RLP

Molecular Formula:C20H14N2O

Molecular Weight: 298.34

CAS Registry Number:2653-64-7

Manufacturing Methods :Naphthalen-1-amine diazotization and Naphthalen-2-ol coupling.

Properties and Applications:blue light red. Melting point 224 ℃ (by toluene in crystallization bronze flake crystal). Soluble in hot ethanol and benzene in red. In concentrated sulfuric acid to red light blue, dilution after red purple solution, and then have red brown precipitation. Dye ethanol solution to join concentrated hydrochloric acid is dark red; With strong caustic for brilliant red light brown. And C.I.Solvent Red 4 the same chemical structure.

Light Fastness Heat resistance(℃ ) Sodium carbonate(5%) Muriatic acid(5%) Oleic acid PVC migration Soap micelle bleeding
Melting point Stable
General 224 Stable to 120(1hr) unchanging unchanging Poor No

List of Suppliers:

Autol Red RLP


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