Specification Test Results

• Appearance:
  Green to dark blue Crystalline powder
• Infrared spectrum:
  Conforms
• Loss on drying:
  ≤8 % (1 g, 110°C)
• Solubility:
  (0.1% in 50% ethanol) Clear blue
• Specific absorbance A (1%/1cm):
  ≥1500 (625 to 630 nm, 50% ethanol)