Specification Test Results

• Assay:
  99.0 - 101.0 %
• pH (25°C; 5 %):
  3.5 - 6.0
• Heavy metals (as Pb):
  Max. 5 ppm
• Insolubility in water:
  Max. 50 ppm
• Not precipitated by (NH₄)₂S (as SO₄):
  Max. 0.4 %
• Reducing substances (as O):
  Max. 5 ppm
• SO₄ (Sulphate):
  Max. 50 ppm
• Ca (Calcium):
  Max. 50 ppm
• Co (Cobalt):
  Max. 20 ppm
• Cu (Copper):
  Max. 5 ppm
• K (Potassium):
  Max. 100 ppm
• Fe (Iron):
  Max. 5 ppm
• Mg (Magnesium):
  Max. 50 ppm
• Na (Sodium):
  Max. 0.05 %
• Pb (Lead):
  Max. 5 ppm
• Zn (Zinc):
  Max. 50 ppm
• Conforms to ACS:
  Passes test