| Chemistry name: | manganese phosphate; manganous orthophosphate |
| M Formula: | Mn3(PO4)2•7H2O |
| Properties: | |
| Reddish-white powder. Soluble in mineral acids; insoluble in water. | |
| Derivation: | |
| By the action of orthophosphoric acid on manganous hydroxide. | |
| Use: | |
| Conversion coating of steels, aluminum, and other metals. | |