Calcium carbonate is an inorganic compound with the chemical formula CaCO₃, which is the main component of limestone, marble, etc. Calcium carbonate is basically insoluble in water and soluble in hydrochloric acid (reacts with hydrochloric acid). It is one of the common substances on earth and exists in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of some animal bones or shells. Calcium carbonate is also an important building material and is widely used in industry.
Chemical formula: CaCO₃
Molecular weight: 100.0869
CAS Number: 471-34-1
EINECS Accession Number: 207-439-9
Melting point: 1339 ℃
Density: 2.93 g/cm³
Water solubility: almost insoluble in water, soluble in acid.
Appearance: white crystalline powder
The action of calcium carbide and water can generate acetylene gas, which is an important basic raw material for organic synthesis. Acetylene gas can produce polyvinyl chloride, neoprene, calcium cyanamide, acetic acid, vinyl acetate ethanol and its derivatives, cyanide
Compounds, dicyandiamide and acetone, etc. The action of calcium carbide and nitrogen to generate lime nitrogen can be used as agricultural fertilizer. Calcium carbide is used to generate acetylene for metal cutting and welding.
Oral LDso in rats: 6450 mg/kg. Strong irritant to eyes and moderate to skin. Store in a cool, ventilated warehouse. It should be stored separately from acids, ammonium salts, etc. Do not bump, roll or drop when handling. Pay attention to personal protection during sub-packaging and handling operations.