Specifikationstestresultat

• Appearance:
  Dark red to brown Powder
• Infrared spectrum:
  Conforms
• Solubility:
  (0.1 % in water) Clear
• Specific extinction E (1%/1cm):
  ≥1600 (558 nm, in buffer)
• Visual transition interval:
  from pH 6.8 (yellow) to pH 8.2 (red)