Reference Mixture ratio: Plaster of Paris: water = 3:2
Mix, Gypsum (100g) + Water (35-45g). Leave it to dry for 1 day.
*Please refer to the display picture.
CAS Number: 7778-18-9; 10034-76-1 (hemihydrate); 10101-41-4 (dihydrate)
Other names: Plaster of Paris, Drierite, Gypsum
Calcium Sulphate is an inorganic compound found in nature in both a hydrated form and a dry, crystalline form. It is odourless and is most often found as a white powder. The presence of impurities will impart colours to the powder. The properties of Calcium Sulphate is very much influenced by the amount of water of crystallisation presence the molecules, and this in turns makes it useful for different applications. In the form of γ-anhydrite (the anhydrous form), it is used as a desiccant. With water, it turns into the hemihydrate a paste-like substance that dries hard. All forms are white solids that are poorly soluble in water. Calcium Sulphate causes permanent hardness in water.
1. Used in food products as additive and preservative, as anti-foaming and an anti-caking agent, Calcium Sulphate is one of the most popular food additives.
2. As a pigment:
Calcium sulfate is a white color powder and is mixed with paints to create white paint. This type of paint is used for art painting and both exterior and interior paints.
3. Calcium Sulphate is added to cement to quicken the setting time.
4. Calcium sulfate is used as a coating agent for papers and adds thickness and durability, making the paper tougher.
5. Calcium Sulphate added to fertilizer makes the fertilizer to be acidic which is used in alkaline soil.
6. Calcium Sulphate is to remove impurities in Aluminium extraction processes.