CalCium Carbonate                > 98.50%
Acid Insolubles                    < 0.15%
Arsenic                         < 0.3ppm
Barium                          Negative
Fluoride                         < 0.004%
Heavy Metals (as Pb)               < 0.002%
Lead                           < 0.20ppm
Magnesium and Alkali Salts          < 0.50%
Iron                             < 0.05%
Mercury                         < 0.1ppm