Magnesium Carbonate BulkSupplements.com Sale! from $134.00 USD /per Size 25 Kilograms (55 lbs) 1 Kilogram (2.2 lbs) 500 Grams (1.1 lbs) 250 Grams (8.8 oz) 100 Grams (3.5 oz) Produc variants 25 Kilograms (55 lbs) 1 Kilogram (2.2 lbs) 500 Grams (1.1 lbs) 250 Grams (8.8 oz) 100 Grams (3.5 oz) Qty. Add to Cart Couldn't load pickup availability Refresh Assay: NLT 95% (as Magnesium Carbonate H2O, dry basis), NLT 25% (as Magnesium, DB), 42 - 45% (by calclulation, as MgO, DB) ( Solvent: None Source: