... carbonate; 2. High brightness, high whiteness selected flawless natural mineral products typical whiteness ≥ 95; 3. Impurity ... products can be applied: As alkaline agent in food processing, nutritional supplements, dough conditioner, firming agent, ... and low impurity content of the health-care grade natural calcium carbonate, to lead, heavy metals and ... contact me. Calcium carbonate food grade 98-102%