Specification Test Results

• Assay (iodometric):
  97.0 - 100.0 %
• Assay (iodometric, SO₂):
  65.4 - 67.4 %
• Identity:
  passes test
• Appearance of solution:
  passes test
• pH-value (5 %; water):
  3.5 - 5.0
• Chloride (Cl):
  ≤ 0.01 %
• Heavy metals (as Pb):
  ≤ 0.001 %
• Thiosulfate (S₂O₃):
  ≤ 0.05 %
• As (Arsenic):
  ≤ 0.0002 %
• Fe (Iron):
  ≤ 0.0005 %
• Hg (Mercury):
  ≤ 0.0001 %
• Pb (Lead):
  ≤ 0.0002 %
• Se (Selenium):
  ≤ 0.0003 %
• Residual solvents (Ph Eur/USP/ICH):
  excluded by the manufacturing process