Specification Test Results

• Assay:
  Min. 99.5 %
• Assay (calculated to the dried substance):
  99.5 - 100.5 %
• Water insoluble matter:
  Max. 0.005 %
• Loss on drying (105°C):
  Max. 0.5 %
• Residue on ignition (SO₄):
  Max. 0.01 %
• pH (5 %, 25 °C):
  4.5 - 5.5
• Acidity or alkalinity:
  complying
• Arsenic (As):
  Max. 0.5 ppm
• Calcium (Ca):
  Max. 5 ppm
• Copper (Cu):
  Max. 2 ppm
• Iron (Fe):
  Max. 2 ppm
• Potassium (K):
  Max. 0.005 %
• Magnesium (Mg):
  Max. 5 ppm
• Vapor Pressure:
  1 mmHg ( 160.4 °C)
• Sodium (Na):
  Max. 0.005 %
• Nickel (Ni):
  Max. 0.0001 %
• Lead (Pb):
  Max. 1 ppm
• Zinc (Zn):
  Max. 0.0002 %
• Heavy metals (ICP) ACS:
  Max. 5 ppm
• Nitrate (NO₃):
  Max. 0.0005 %
• Phosphate (PO₄):
  Max. 2 ppm
• Sulfate (SO₄):
  Max. 20 ppm
• Iodide and bromide:
  complying
• Appearance of the solution:
  complying