Calcium carbonate is white, odorless, insoluble powder (pH 9.0-10.0) serving as filler in plastics, paper, paints, and construction materials, or as active pharmaceutical ingredient in antacids and calcium supplements, or as food additive (E170) in products requiring calcium fortification. The application determines grade requirementsindustrial grade for fillers and extenders where purity matters less than particle size distribution and brightness, pharmaceutical grade meeting USP/EP monographs for heavy metal limits and acid-insoluble residues, food grade complying with FDA/EFSA specifications. Buyers specify mesh size (200 mesh, 300 mesh, 400 mesh indicating fineness) based on applicationfiner grades for pharmaceutical tablets requiring uniform dissolution, coarser grades for plastic fillers where processing equipment and cost-per-ton economics favor less refined material.
50kg bags
