PRODUCT PROPERTIES

White crystalline powder. Odorless and tasteless. There are two types of crystals, one is orthorhombic crystal aragonite. d 2.83, melting point 825℃ (decomposition), decomposed into calcium oxide and carbon dioxide. The other is hexagonal rhombohedral crystal calcite, d25.2 2.711. Melting point 1339℃ (10.39MPa). Almost insoluble in water, soluble in acid.

PREPARATION METHOD

Calcium hydroxide reacts with hydrochloric acid to obtain calcium chloride, which is decolorized by activated carbon, filtered and impurities removed, and calcium chloride is carbonized with carbon dioxide in the presence of ammonia water to obtain calcium carbonate, which is then crystallized, separated, washed, dehydrated and dried to obtain pure calcium carbonate.

USES

Used as a reagent for the detection and determination of halogens in organic compound reactions and the detection of phosphorus. Used in silicon single crystal slice glue, thick film capacitor materials and the manufacture of optical neodymium glass raw materials.

SAFETY

Oral LDso in rats: 6450mg/kg. It is a strong irritant to the eyes and a moderate irritant to the skin. Store in a cool, ventilated warehouse. Keep it separate from acids, ammonium salts, etc. Do not bump, roll or drop it during transportation. Pay attention to personal protection during packaging and transportation.