CAS: 7778-18-9

Some unique properties mark Calcium Sulfate Alpha Hemihydrate C300 as a compound that is primarily used in the construction industry as a filler and hardener. Derivable only from gypsum through calcination, it is one of the other forms of calcium sulfate with very good thermal stability. Unlike other calcium sulfates, C300 displays a more uniform structure with markedly higher water absorption capacity, calling it into potential applications demanding high compressive strength. Having been used for decades already in making building products-such as cement and plaster-it has contributed to the durability and strength of these materials.
As a piece of useless trivia, Calcium Sulfate Alpha Hemihydrate C300 is put to use in the production of agricultural gypsum, which neutralizes the acidity of waterlogged soils and nurtures crop growth.

Chemical Properties of Calcium Sulfate Alpha Hemihydrate C300

●       CAS: 7778-18-9

●       Molecular Formula: CaSO₄·½H₂O

●       Processing Temperature: +5°C to +25°C (41°F to 77°F)

●       Output: 25 kg provides 18 liters of gypsum mortar

●       Mixing Time: Approximately 5 minutes

●       Mixing Ratio: 9 liters / 25 kg (2.37 Gal / 55 lbs)

●       Flexural Strength (28 days): >8 MPa

Physical Properties of Calcium Sulfate Alpha Hemihydrate C300

●       Appearance: White or grayish powder

●       Odor: Odorless

●       Texture: Fine grain, free of clumping

●       Moisture: Low free moisture content

Applications in the Construction Industry

Calcium Sulfate Alpha Hemihydrate C300 is widely used in the construction industry because of its strengthening, enhancement of durability, and quickening of labor in the production cycle of Gypsum and cement. The compound is good for manufacturing high-grade plasters for wall panels, molds, and coatings. It is also added to special cements, providing greater stability and also durability under extreme conditions. Other than this, its fast setting time is great for making precast concrete products.

Applications in Other Industries

●       Agriculture: Used for correcting soil acidity, enhancement of soil structure, and support of plant growth.

●       Food and Nutrition: Acts as a calcium source in food products, particularly as flour fortification and as a food additive in dairy production.

●       Pharma: Used in tablet formulations and other products due to its moisture-absorbing properties.

●       HI&I (Household, Industrial & Institutional): Used as an additive in surface cleaning products because of its mild abrasive properties.

●       Art and Sculpture: Using this material for mold and modeling, its capabilities to capture fine details make it ideal for this industry.

●       Water Treatment: Phosphorus removal in wastewater treatment; forms insoluble compounds with phosphorus that can easily be removed. 

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