Specification Test Results

• dentity (UV/VIS-Spectrum):
  passes test
• Appearance:
  Black to dark brown-black fine powder, eventually with granular parts
• Clarity of solution:
  passes test
• Absorption maximum λmax. (buffer pH 10.0):
  612 - 616 nm
• Spec. Absorptivity A 1%/1cm (λmax; 0.02 g/l; buffer pH 10.0; calc. on dried substance):
  400 - 510
• Loss on drying (110 °C):
  ≤ 7 %
• Suitability as indicator (for complexometric titration, ACS):
  passes test
• Suitability as indicator (Reag. Ph. Eur.):
  passes test