Specification Test Results

• Appearance:
  Bordeaux to dark purple-brown Crystalline powder
• Infrared spectrum:
  Conforms
• UV Lambda max:
  588 to 596 nm (in 50:50 ethanol:water)
• Absorption Ratio P-15/P+15:
  1 to 1.2
• Specific absorbance A (1%/1cm):
  ≥700 (at lambda max.)