... the famous Gold pennies experiment.3. Used in the refining of alumina containing ore (bauxite) ... aluminum metal via the smelting process.4. Used in soap making (cold process soap, saponification)5 ... Used as a drain cleaning agent for clearing dogged drains in life.7. Used as a cleaner in breweries, ... , 25KG/bag, 25mts/1×20containerStorage:Sealed, stored in ventilating and dry place, away from heat, fire ...