Calcium sulfate, with the formula CaSO4, is a common laboratory and industrial chemical. In the laboratory, anhydrous calcium sulfate is a desiccant, while calcium sulfate dihydrate is a common gypsum. But water containing calcium sulfate becomes permanent hard water.
Name | Calcium sulfate hemihydrate | EINECS | 231-900-3 |
CAS No. | 10034-76-1 | Density | 2.69 g/cm3 |
PSA | 97.87000 | LogP | -0.32150 |
Solubility | sets to hard mass when mixed with H2O [MER06]; g/100g solution H2O: 1.23 (0°C), 0.71 (25°C), 0.189 (100°C); solid phase, CaSO4 · 1/2H2O [KRU93] | Melting Point | 1450oC
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Formula | Ca.H2O4S.1/2H2O | Boiling Point | 330 °C at 760 mmHg |
Molecular Weight | 145.15 | Flash Point | N/A |
Transport Information | N/A | Appearance | white powder |
Appearance and properties: white powder
Boiling point: 330ºC at 760mmHg
Melting point: 1450ºC
Stability: Stable. Hygroscopic.
Storage conditions: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Usage:Application Type α is used in construction for high strength gypsum members, gypsum boards, casting models and fixed cementing workpieces during machining. β type is mainly used in building materials, plaster components, plaster statues, ceramics, precision machinery casting mold, chalk, gelling agent and so on.