Specification Test Results

• Assay:
  Min. 98.0 %
• Water insoluble matter:
  Max. 0.005 %
• Residue on ignition (SO₄):
  Max. 0.01 %
• pH (5 %, 25 °C):
  4.5 - 6.0
• Calcium (Ca):
  Max. 0.002 %
• Cadmium (Cd):
  Max. 0.0005 %
• Copper (Cu):
  Max. 0.0005 %
• Iron (Fe):
  Max. 1 ppm
• Potassium (K):
  Max. 0.001 %
• Magnesium (Mg):
  Max. 0.001 %
• Sodium (Na):
  Max. 0.001 %
• Lead (Pb):
  Max. 0.0005 %
• Zinc (Zn):
  Max. 0.0005 %
• Heavy metals (as Pb):
  Max. 5 ppm
• Chloride (Cl):
  Max. 3 ppm
• Nitrite (NO₂):
  Max. 0.0005 %
• Phosphate (PO₄):
  Max. 5 ppm
• Sulfate (SO₄):
  Max. 0.002 %