Pigment Red 51
Name:C.I.Pigment Red 51,C.I.15580
Molecular Structure: Single azo
C.I.Pigment Red 51,C.I.15580,CAS 5850-87-3,342.37,C17H14N2O4S
Molecular Formula:C17H14N2O4S
Molecular Weight: 342.37
CAS Registry Number:5850-87-3
Manufacturing Methods : 4-Amino-2-methylbenzetiesulfonic acid diazotization, and Naphthalen-2-ol coupling, and then convert it to barium salt.
Properties and Applications:yellow red. In concentrated sulfuric acid for wine red, dilution after big red precipitation, in concentrated nitric acid for wine solution; In concentrated sodium hydroxide solution for wine solution.
| Light Fastness | Heat resistance(℃ ) | Sodium carbonate(5%) | Muriatic acid(5%) | Oleic acid | PVC migration | Soap micelle bleeding | |
| Melting point | Stable | ||||||
| 4-5 | 4 120(20min) | 3 | 4-5 | 3 | 1 | ||
List of Suppliers:
[…] C.I.Pigment Red 51 […]