Specification Test Results

• Assay:
  ≥ 99 %
• Appearance:
  White crystalline powder
• Filter test:
  Conforms to standard
• RP gradient test :
  Conforms to standard
• Solubility in water (0.1 g/ml; 25°C):
  Colourless, complete
• pH (20°C; 10 %):
  4,0 - 4,5
• Absorbance (210 nm) (0.5 mol/l):
  ≤ 0,1
• Absorbance (260 nm) (0.5 mol/l):
  ≤ 0,06
• Absorbance (280 nm) (0.5 mol/l):
  ≤ 0,04
• Absorbance (320 nm) (0.5 mol/l):
  ≤ 0,02
• Absorbance (500 nm) (0.5 mol/l):
  ≤ 0,02