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Calcium Sulphate Hemihydrate 96%

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Price: £27.39

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Stock Availability

On Shelf - Approx. UK delivery date: Tuesday the 08th April 2025*

In bulk stock - ships within 4 - 8 Days (Excluding weekends and public holidays)

4 - 6 Weeks Approx.

UK Shipping

We can only ship to Northern Ireland where a Royal Mail postal option has been chosen at checkout.

We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.

AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE

* We will always try to ship as early as possible

Applications

Calcium Sulphate Hemihydrate 96%

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

General

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.

Specification

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%

Hazards

Hazard Phrases: Not considered harmful under normal laboratory conditions

Cas No: 7778-18-9

Einecs No: 231-900-3

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Code	Pack	Price
SCCALSUL1-100G-FOIL	100g Foil Pouch	£4.21
SCCALSUL1-250G-FOIL	250g Foil Pouch	£4.61
SCCALSUL1-500G-FOIL	500g Foil Pouch	£5.80
SCCALSUL1-1KG	1Kg	£13.13
SCCALSUL1-2.5KG	2.5Kg	£18.41
SCCALSUL1-5KG	5Kg	£27.39
SCCALSUL1-25KG	25Kg	£85.79

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