Specification Test Results

• Appearance (colour):
  Purple to very dark purple
• Appearance (form):
  Powder or crystals
• Thin layer chromatogr.:
  Corresponds to standard
• Solubility (colour):
  0.01 g in 10 ml water
• Solubility (method):
  0.01 g in 10 ml water
• pH-transition:
  9.4
• Colour:
  Blue
• Wavelength (1) (UV):
  595.0 - 605.0 nm
• Extinction (1%/1 cm) (1) (UV):
  ≥400
• Wavelength (2) (UV):
  310.0 - 320.0 nm
• Extinction (1%/1 cm) (2) (UV):
  ≥200
• Solvent (UV):
  HCl 0.005 m