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Puerto Rico
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DL-Methionine 99+%
DL-Methionine 99+%
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DL-Methionine 99+%

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Specification Test Results

  • Appearance:
    White Crystalline powder or crystals
  • Infrared spectrum:
    Conforms
  • Loss on drying:
    ≤0.5 % (1 g, 105°C)
  • Sulfated ash:
    ≤0.1 %
  • UV transmittance:
    ≥95 % (c=10, 2 N HCl, 430 nm) 1 cm cell
  • pH:
    5.4 to 6.1 (2 % w/v in water)
  • Titration with HClO4:
    99.0 to 101.0 % (on dried substance)
  • Chloride (Cl):
    ≤200 ppm
  • Sulfate (SO4):
    ≤200 ppm
  • Ammonium (NH4):
    ≤1000 ppm
  • Heavy metals (as Pb):
    ≤10 ppm
  • Other amino acids:
    ≤0.2 % (TLC)

Specification Test Results