Specification Test Results

• Assay:
  Min. 99.5 %
• Assay (calculated to the dried substance):
  99.0 - 100.5 %
• Loss on drying (105°C):
  Max. 0.2 %
• pH (5 %, 25 °C):
  6-8
• Free alkali (as KOH):
  Max. 0.02 %
• Arsenic (As):
  Max. 0.00001 %
• Barium (Ba):
  Max. 0.002 %
• Calcium (Ca):
  Max. 0.001 %
• Iron (Fe):
  Max. 3 ppm
• Magnesium (Mg):
  Max. 0.001 %
• Sodium (Na):
  Max. 0.03 %
• Heavy metals (as Pb):
  Max. 5 ppm
• Bromide, chloride (as Cl):
  Max. 0.01 %
• Iodate (JO₃):
  complying
• Iodate (IO₃):
  Max. 0.0002 %
• Phosphate (PO₄):
  Max. 0.001 %
• Sulfate (SO₄):
  Max. 10 ppm
• Thiosulfate (S₂O₃):
  complying
• Total N:
  Max. 0.001 %
• Reducing impurities:
  complying
• Appearance of the solution:
  complying