Specification Test Results

• Assay (acidimetric, calc. on anhydrous substance):
  99.5 - 100.5 %
• Identity (IR-spectrum):
  passes test
• Appearance:
  white to almost white or colorless crystals
• Appearance of solution (200 g/l; water):
  clear (≤ 3 NTU) and not more intense in color than reference solution Y₇, BY₇ or GY₇
• In water insoluble matter:
  ≤ 50 ppm
• Chloride (Cl):
  ≤ 5 ppm
• Phosphate (PO₄):
  ≤ 10 ppm
• Sulphate (SO₄):
  ≤ 20 ppm
• Heavy metals (as Pb):
  ≤ 5 ppm
• Al (Aluminium):
  ≤ 0.2 ppm
• As (Arsenic):
  ≤ 1 ppm
• Hg (Mercury):
  ≤ 1 ppm
• Cu (Copper):
  ≤ 5 ppm
• Fe (Iron):
  ≤ 3 ppm
• Fe (Iron, acc. to Reag. Ph  Eur.):
  suitable to use in the limit test for iron
• Pb (Lead):
  ≤ 0.5 ppm
• Oxalates (as C₂H₂O₄):
  ≤ 50 ppm
• Readily carbonisable substance:
  passes test
• Sulfated ash:
  ≤ 200 ppm
• Water (according to Karl Fischer):
  7.5 - 8.8 %