Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which is a type of sedimentary rock consisting mainly of calcite) and is the main component of pearls and the shells of marine organisms, snails, and eggs. Calcium carbonate is the active ingredient in agricultural lime and is created when calcium ions in hard water react with carbonate ions to create limescale. It is medicinally used as a calcium supplement or as an antacid, but excessive consumption can be hazardous and cause poor digestion.


Product Calcium Carbonate

General Characteristics


Properties Specification Result
Description Fine, white, or colorless, microcrystalline powder. Complies
Solubility Practically insoluble in water and in ethanol (95%). It is soluble with effervescence in dilute acids. Complies
Foreign Particles Free from any foreign particle. Complies
Identification Test A: The sample dissolves with effervescence in each case. Test B (Calcium): Each solution passes tests. Complies Complies
Acid Insoluble Substance Not more than 0.2%. 0.1%
Inorganic Impurities Arsenic: Not more than 3 mg/kg Fluoride: Not more than 0.005%. Lead: note more than 3 mg/kg.  2.5 mg/kg 0.003% 2.7 mg/kg
Magnesium & Alkali Metals Residue not more than 1%. 0.8%
Loss on Drying (200OC for 4 hrs.) Not more than 2.0%. 1.6%
% Assay as (CaCO3) 98.0% to 100.5% of CaCO3, on dried basis 99.5
Particle Size 100% passes through 80# Complies
  Additional Test  
Bulk Density 0.700 to 0.900 gm/ml 0.850 gm/ml
Tapped Density 0.900 to 1.400 gm/ml 0.990 gm/ml