Pigment Red 21
| Pigment Name | Fast Red 2R-A | 2R-B |
| Color Index No | Pigment Red 21 |
| CAS No | 6410-26-0 |
| EU No | 229-096-4 |
| PH Value | 6.0-7.0 |
| Density | 1.5 |
| Oil Absorption | 40 |
| Light Fastness | 7 |
| Heat Resistance | 302 °F (150°C) |
| Water Resistance | 4 |
| OIl Resistance | 3 |
| Acid Resistance | 3 |
| Alkali Resistance | 3 |
Main Applications
Pigment Red 21 is a yellowish mono azo red pigment with high strong color strength and easy dispersing. It is mainly used in: