Specification Test Results

• Appearance (Colour):
  Dark Brown to Very Dark Brown and Red-Brown and Brown-Red
• Appearance (Form):
  Powder
• Infrared spectrum:
  Conforms to Structure
• Wavelength:
  505 - 511 nm
• Extinction Coefficient:
  ≥25000
• Extinction Coefficient, C = 0.01 g/L, H₂O:
  ≥12000
• Carbon:
  23.2 - 79.9%
• Nitrogen:
  4.6 - 16.1%
• TLC:
  Consistent with Past Lots
• Solubility (Colour), C = 0.1% in H₂O:
  Dark Red to Very Dark Red