Sodium Metabisulfite, Reagent Grade (chemically pure) – 1 lb. bag
- One pound of precipitant is all you need for each pound of metal that is being refined (other contents such as plastic, ceramic, etc. do not count).
- Comes with complete instructions for precipitating pure gold and a link to free and complete instructions for the entire gold refining process.
- We recommend that all selective precipitants be used in conjunction with Precious Metal Test Liquid, a saturated solution of stannous chloride and pure tin dissolved in HCl.
- Please note that sodium metabisulfite, when dissolved, produces an acidic solution with a very strong and unpleasant odor that is irritating to eyes, nasal passages and lungs.
When refining gold to very high purity (99.95%+ pure), it is essential to use Reagent Grade chemicals. Reagent grade is the highest purity available. This popular precipitant of gold, sodium metabisulfite, will precipitate 99.95%+ pure gold after thorough rinsing. Comes with detailed written instructions, free tech support and a link to detailed youtube video instructions.