Specification Test Results

• Assay (acidimetric):
  99.5 - 101.0 %
• Assay (calculated to the dried substance):
  99.5 - 101 %
• Loss on drying (on silicagel, 4h):
  Max. 0.1 %
• pH (5 %, 20°C):
  8.0 - 8.6
• Ammonium (NH₄):
  Max. 20 ppm
• Arsenic (As):
  Max. 1 ppm
• Calcium (Ca):
  Max. 50 ppm
• Iron (Fe):
  Max. 10 ppm
• Mercury (Hg):
  Max. 1 ppm
• Sodium (Na):
  Max. 0.03 %
• Lead (Pb):
  Max. 2 ppm
• Heavy metals (as Pb):
  Max. 5 ppm
• Chloride (Cl):
  Max. 50 ppm
• Carbonate (K₂CO₃):
  Max. 2.5 %
• Sulfate (SO₄):
  Max. 100 ppm
• Residual solvents:
  complying
• Appearance of the solution:
  complying