Dye|Dye intermediates|Fluorescent Brightener|pigment dye

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

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.

List of Suppliers:

Autol Red RLP