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Calcium sulfate hemihydrate
Calcium sulfate (or calcium sulphate) is the inorganic compound with the formula CaSO4 and related hydrates. In the form of γ-anhydrite (the anhydrous form), it is used as a desiccant. One particular hydrate is better known as plaster of Paris, and another occurs naturally as the mineral gypsum. It has many uses in industry. All forms are White solids that are poorly soluble in water. Calcium sulfate causes permanent hardness in water.
What is ICSC Number of calcium sulfate hemihydrate?
What is the specific optical rotation of calcium sulfate hemihydrate?
What are the related applications of calcium sulfate hemihydrate?
Calcium sulfate hemihydrate can be used as a diluent for tablets, capsules, fillers, curing agents for slow-release agents, etc. It can also be used in construction as high-strength gypsum components, plasterboard, casting models and mechanical processing of fixed cementitious processing parts and other aspects.
What is the common method of preparation of calcium sulfate hemihydrate?
The most common preparation method of calcium sulfate hemihydrate is the rotary kiln calcination method. Firstly, the raw gypsum is crushed to l~3mm and then added to the indirectly heated rotary kiln for calcination for 15min, and the final temperature of the material is 140~150℃ (115~125℃ for calcined medical gypsum). The clinker was crushed and screened to produce calcium sulfate hemihydrate.
Whether calcium sulfate hemihydrate is toxic to humans?
Dust of calcium sulfate hemihydrate can cause respiratory diseases. The maximum permissible concentration is 2mg/m3. Respiratory organs should be protected at work by wearing work clothes and protective glasses. Observe personal protective measures and pay attention to dust prevention and dust removal in the workplace.
What is the solubility of calcium sulfate hemihydrate in water?
Grams of calcium sulfate hemihydrate dissolved per 100 ml of water at different temperatures:0.223g/0°C;0.244g/10°C;0.255g/20°CChemicalbook;0.264g/30°C;0.265g/40°C0.244g/60°C;0.234g/80°C;0.205g/100
What is the identification of calcium sulfate hemihydrate?
Add 20mL of 2.7 mol/L hydrochloric acid and 80mL of water to 1g of calcium sulfate, shake well and filter, the filtrate shows sulfate reaction and calcium salt reaction.
Calcium sulfate hemihydrate is soluble in which solvents?
Calcium sulfate hemihydrate is soluble in acids, ammonium salts, sodium thiosulfate and glycerol
What are the aliases for calcium sulfate hemihydrate?
Raw Gypsum, Hard Raw Gypsum, Muriacite, Anhydrous Gypsu
What is the melting point of calcium sulfate hemihydrate?
Composite Paste Based on Calcium Sulfate Hemihydrate for Bone Repair
Original Article: Preparation and characterization of injectable gelatin/alginate/chondroitin sulfate/α-calcium sulfate hemihydrate composite paste for bone repair application
Alireza Chamansara, et al.
Journal of Biomaterials Applications, 2022, 36(10), 1758-1774.