Name:C.I.Solvent Red 52,C.I.68210

Molecular Structure: Pyridineanthrone

C.I.Solvent Red 52,C.I.68210,CAS 81-39-0,366.41,C24H18N2O2,Solvent Red 5B,Transparent Red 5B,Transparent Red H5B,Oil Red 5B,Oil Red R,Sumiplast Red HL5B

Molecular Formula:C₂₄H₁₈N₂O₂

Molecular Weight: 366.41

CAS Registry Number:81-39-0

Manufacturing Methods : (a) 6-Bromo-3-methyl-3H-naphtho[1,2,3-de]quinoline-2,7-dione or 1-Bromo-4-(N-methylacetamido)anthraquinoneand p-Methylaniline condensation; (b)N-(4-(p-toluidino)-9,10-dioxo-9,10-dihydroanthracen-1-yl)-N-methylacetamide closed loop into Anthrapyridone.

Properties and Applications: blue light red. Soluble in water and Pyridine . In concentrated sulfuric acid for deep red, red precipitation after dilution. Used for acetate, polyethylene, thermal plastic coloring.