Specification Test Results

• Dye content (spectrophotometrically):
  ≥ 95 %
• Appearance:
  Yellow to tan powder
• Appearance of solution:
  Conforms
• Identification (IR):
  Passes test
• Sensitivity:
  Passes test
• Transition range (according to ACS):
  Passes test
• Visual transition interval:
  pH 3.8 - pH 5.4
• Loss on drying (110°C):
  ≤ 3 %