Calcium Sulphate di-Hydrate is also known as Gypsum. It is a soft sulphate mineral composed of calcium sulphate dihydrate, with the chemical formula CaSO4-2H2O. It can be used as a fertilizer, is the main constituent in many forms of plaster and is widely mined.

Home Brewing
Manufacture of Gypsum Blocks and Board
Ingredient of Plaster
Fertiliser and Soil Conditioner
Alabaster for Sculptures
General Laboratory Chemical

EEC Additive No: E516
Food Grade

Minimum Assay: 99%
Molecular Formula: CaSO4•2H2O
Molecular Weight: 172.17 (136.14anhy)
Solubility in Water: 2.1g/L
Melting Point: 1450° C
Substance insoluble in HCl: <0.005%
Loss on drying: <23%
Fluoride (F): : <30mg/Kg
Selenium (Se): <30mg/Kg
Arsenic (As): <3mg/Kg
Heavy metals (as Pb): <2mg/Kg
Mercury (Hg): <1mg/Kg
Mean Particle Diameter: 20 microns
Sieve Analysis:
2.5% @ 150um
10% @ 75um
Oil Absorbotion: <33ml/g
Hardenss (MOH’s): 2

Hazard Phrases: Not considered harmful under normal laboratory conditions

Cas No: 10101-41-4
Einecs No: 231-900-3