Pigment Red 48:4 CAS #5280-66-0

The relevant information of Pigment Red 48:4 is as follows:
Molecular formula: C_{18}H_{10}N_{2}O_{6}SCl^{-3}.Mn^{+2}
Molecular weight: 472.7378
Alias: Permanent Red 2bl, Permanent Red bbm, Sun-fast Dark Red bbm, 3126 Sun-fast Dark Red bbm, 3136 Permanent Red 2bm, Permanent Red 2brs, etc.
Color and properties: red powder
Physical and chemical properties: hue or color is blue light red, relative density 1.52-2.20, bulk density 12.6-18.3lb/gal (pounds/gallon), melting point about 360℃. Excellent light and heat resistance, but poor acid and alkali resistance.
Use: Mainly used for coloring inks, plastics, coatings, stationery and paint printing. It can also be used in industrial paints, water-based coatings, water-based inks and other fields.
The pigment is usually prepared by 2b-acid diazotization and 2,3-acid coupling to form the parent dye, which is then reacted with manganese chloride to form the pigment.