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L(+)-Histidine 98%
L(+)-Histidine 98%
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L(+)-Histidine 98%

Specification Test Results

  • Appearance:
    White Crystalline powder or crystals
  • Infrared spectrum:
    Conforms
  • Loss on drying:
    ≤0.2 % (105°C, 3 h)
  • Sulfated ash:
    ≤0.1 %
  • UV transmittance:
    ≥98 % (c=5, H2O, 430 nm) 1 cm cell
  • pH:
    7.0 to 8.5 (2 % in water)
  • Specific optical rotation:
    +12.0° to +14.0° (20°C, 589 nm) (c=11, 6 N HCl) (on dry substance)
  • Titration with HClO4:
    97.5 to 102.5 % (On dry substance)
  • Chloride (Cl):
    ≤200 ppm
  • Sulfate (SO4):
    ≤200 ppm
  • Ammonium (NH4):
    ≤200 ppm
  • Iron (Fe):
    ≤10 ppm
  • Heavy metals (as Pb):
    ≤10 ppm

Specification Test Results

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