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Calcium Sulphate Hemihydrate 96%

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Calcium Sulphate Hemihydrate 96%

Calcium Sulphate Hemihydrate 96%

Calcium Sulphate Hemihydrate 96%

  • Used as a common component of fouling deposits in industrial heat exchangers

Calcium sulphate (or calcium sulfate) is a common laboratory and industrial chemical. In the form of gamma-anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like tofu. In the natural state, unrefined calcium sulphate is a translucent, crystalline white rock. When sold as a colour-indicating variant under the name Drierite, it appears blue or pink due to impregnation with Cobalt(II) chloride, which functions as a moisture indicator. The hemihydrate (CaSO4.~0.5H2O) is better known as plaster of Paris, while the dihydrate (CaSO4.2H2O) occurs naturally as gypsum. The anhydrous form occurs naturally as beta-anhydrite. Depending on the method of calcination of calcium sulphate dihydrate, specific hemihydrates are sometimes distinguished: alpha-hemihydrate and beta-hemihydrate. They appear to differ only in crystal shape. Alpha-hemihydrate crystals are more prismatic than beta-hemihydrate crystals and, when mixed with water, form a much stronger and harder superstructure.

Minimum Assay: <96%
Molecular Formula: CaO4S
Molecular Weight: 136.14
Solubility in water: 0.24g in 100g water
Melting Point:  1450°
Density (g/cm3): 2.96
Loss on ignition: <2.85%

Hazard Phrases: Causes skin irritation. Causes serious eye irritation.

Prec Phrases: Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF ON SKIN: Wash with plenty of soap and water. Specific treatment (see Take off contaminated clothing and wash before reuse. If skin irritation occurs: Get medical advice/attention.

Harmful CLP Image

Cas No: 7778-18-9
Einecs No: 231-900-3
Code Pack Price Qty  
ECE1024-X 100g £3.95
ECE1024-2X 250g £4.95
GPC1024-2X 250g £5.95
ECE1024-5X 500g £7.95
GPC1024-5X 500g £9.95
GPC1024-Y 1Kg £14.95
GPC1024-2.5Y 2.5Kg £19.95
GPC1024-5Y 5Kg £28.95
GPC1024-10Y 10Kg £39.95
GPC1024-25Y 25Kg £75.95

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