Specification Test Results

• Assay (acidimetric, as K₂S₂O₇):
  97.5 - 100.0 %
• Acidity (as H₂SO₄):
  37.5 - 38.6 %
• Insoluble and by ammoniumhydroxide precipitated matter:
  ≤ 0.01 %
• Chloride (Cl):
  ≤ 0.0005 %
• Phosphate (PO₄):
  ≤ 0.001 %
• Total nitrogen (N):
  ≤ 0.002 %
• Heavy metals (as Pb):
  ≤ 0.001 %
• Al (Aluminium):
  ≤ 0.001 %
• As (Arsenic):
  ≤ 0.0005 %
• Ca (Calcium):
  ≤ 0.002 %
• Fe (Iron):
  ≤ 0.0005 %
• Mg (Magnesium):
  ≤ 0.0005 %
• Na (Sodium):
  ≤ 0.01 %
• Water (H₂O):
  ≤ 2.5 %