Calcium Sulphate
Gypsum,Dihydrate
| PROPERTIES | |
| Properties | |
| Chemical formula | CaSO4 |
| Density | 2.96 g/cm3 (anhydrous) |
| 2.32 g/cm3 (dihydrate) | |
| Melting point | 1,460 °C (2,660 °F; 1,730 K) (anhydrous) |
| Molar mass | 136.14 g/mol (anhydrous) |
| 145.15 g/mol (hemihydrate) | |
| 172.172 g/mol (dihydrate) | |
| SPECIFICATION | ||
| Specification | : | Agricultural Grade |
| Description: | : | White Powder |
| Assay: | : | 95％ Min |
| Whiteness : | : | 90% min |
| Specific weight(g/m3): | : | 2.36 |
| Crystal water(%): | : | 19-21 |
| Free Moisture at 45 °C: | : | ≤1.0% |
| Sulfur trioxide SO3 (%): | : | 44-46 |
| Calcium oxide CaO (%): | : | 31-33 |
| Magnesium oxide MgO (%): | : | 0.2-0.8 |
| Carbon dioxide CO2 (%): | : | 0.5-1.0 |
| Acid Insoluble Matter (%): | : | 0.2-1.0 |
| PH—10% Slurry 10%: | : | 6.8-7.2 |
| Fluorine (F): | : | 0.01% MAX |
| Selenium(Se): | : | 0.005% MAX |
| Arsenic(As): | : | 0.001％ MAX |
| Plumbum(Pb): | : | 0.001％ MAX |