Specification Test Results

• Appearance:
  Yellow to orange to brown Powder
• Infrared spectrum:
  Conforms
• Water:
  ≤9.5 % (K.F.)
• Appearance of solution:
  (0.2% soln. in 0.02 M NaOH) clear, deep red-purple
• UV Lambda max:
  425 to 430 nm (C=10 mg/l, Methanol)
• Titration with NaOH:
  97 to 103 % (On dry substance)
• Absorbance:
  ≥0.42 (lambda max, after 1 hr.)(2 ml of a 0.2% soln. in 0.02 M NaOH + 5 ml acet