Caustic soda, with the chemical formula NaOH, is widely used in gold mining for pH control and in the cyanidation process. It helps maintain the alkaline environment necessary for the effective extraction of gold from ores. By adjusting the pH of the cyanide solution, caustic soda ensures that gold dissolves efficiently, facilitating its separation from other minerals. Its ability to neutralize acidic components and control the chemical conditions of the leaching process makes it an essential reagent in gold processing.
Test Parameter | Specification | Result |
Appearance | White Flakes or Pellets | Complies |
Purity | ≥ 98% | 98.7% |
Sodium Hydroxide Content | ≥ 97% | 98% |
Moisture Content | ≤ 1% | 0.8% |
pH (1% solution) | 13.0 - 14.0 | 13.5 |
Sodium Carbonate | ≤ 1% | 0.5% |
Heavy Metals | ≤ 10 ppm | < 5 ppm |