Calcium carbonate (CACO3) is a chemical compound commonly derived from rocks and minerals (most notably limestone) through mining or quarrying. Used mainly for construction and industrial purposes, calcium carbonate acts as an effective filler and coating pigment. Its versatile uses include offsetting the acid properties of soil and water, purifying sulfur emissions from power stations, and is a popular filler in plastics.

Here are a few examples of the common applications of CACO3:


Whiteness (min.) 96%
Brightness (min.) 94.5%
Specific Gravity 2.64
d-50 [Average particle size] (µm) 1.8 ± 0.5
d-98 [Top cut] (µm) 8 ± 1
Coating % 1.0