Specification Test Results

• Appearance (Colour):
  Brown to Black may have red or green sheen
• Appearance (Form):
  Powder
• Solubility (Colour), 10 mg/ml, H₂O:
  Dark Red
• Infrared spectrum:
  Conforms to Structure
• Dye Content (Calculated based on UV spectral assay):
  ≥90%
• Recommended Retest Period:
  4 years