50 lbs Bag - Assay Potassium Carbonate

Potassium Carbonate - (Pearl Ash, Potash, Carbonic Acid, Dipotassium Salt; Salt of Tartar) Lab / Assay Grade Formula: K2CO3 Sold by the Each (50 lbs) Bag For use as an ingredient of assaying flux (or flux thinner) for melting or smelting gold and other precious metals.