Carbonic acid, magnesium salt (1:1), mixt. with magnesium hydroxide (Mg(OH)2), hydrate magnesium carbonate hydrate, puratronic magnesium carbonate tetrahydrate, reagent grade MAGNESIUMCARBONATEBASIC,HEAVY,FCC MAGNESIUMCARBONATEBASIC,LIGHT,FCC Magnesium carbonate basic puriss., meets analytical specification of Ph. Eur., BP, E504, light, 40-45% Mg (as MgO) basis, powder (light) Magnesium carbonate basic purum p.a., heavy, >=40% (MgO) Magnesium carbonate basic purum, light, >=40% Mg (as MgO) basis, powder (light)