Here's the info listed on the bag:
Neutralizing value as CaCO3 eq. min. (%) 125
Calcium (Ca) min. (%) 51
Calcium Carbonate (CaCO3) max (%) 5
Calcium Hydroxide (Ca(OH)2) min. (%) 95
Magnesium (Mg) min. (%) 0.3
Magnesium Carbonate (MgCO3) min. (%) 0.0
Magnesium oxide (MgO) min. (%) 0.5
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