Specification Test Results

• Identity:
  passes test
• Assay (alkalimetric, calculated on calcined substance):
  ≥ 93.5 %
• Free alkali (as NaOH):
  ≤ 2.5 %
• In water insoluble matter (calculated on dried substance):
  ≤ 0.2 %
• pH-value (1 %, water):
  11.5 - 12.5
• Fluoride (F):
  ≤ 0.0010 %
• Heavy metals (as Pb):
  ≤ 0.0010 %
• As (Arsenic):
  ≤ 0.00005 %
• Cd (Cadmium):
  ≤ 0.0001 %
• Hg (Mercury):
  ≤ 0.0001 %
• Pb (Lead):
  ≤ 0.0001 %
• Loss on ignition (800 °C):
  45.0 - 57.0 %
• Residual solvents (ICH Q3C):
  excluded by production process