Specification Test Results

• Appearance:
  White to light beige to light grey Powder
• Infrared spectrum:
  Conforms
• Water:
  ≤1 % (K.F.)
• Heavy metals:
  ≤10 ppm
• Sulfated ash:
  ≤0.3 %
• HPLC:
  ≤0.2 % (on dry substance) L-trypthophan
• Specific optical rotation:
  -30.9° to -34.9° (20°C, 589 nm) (c=1, H2O) (on dry substance)
• Titration with HClO4:
  98.5 to 101.5 % (On dry substance)
• Arsenic (As):
  ≤1 ppm