30 Jul Sodium Metabisulfite, 500g, Gold recovery
Sodium Metabisulfite, 500g Sodium metabisulfite, or sodium pyrosulfite, is commonly used to precipitate dissolved gold out of aqua regia and gold chloride solutions. Sodium metabisulfite is a white, slightly yellowish crystalline powder with a sulfur dioxide odor (rotten eggs), dissolving easily in water. When mixed...