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D-(-)-Aspartic acid 99+%
D-(-)-Aspartic acid 99+%
Supplier:  Thermo Fisher Scientific
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D-(-)-Aspartic acid 99+%
Supplier:  Thermo Fisher Scientific

Specification Test Results

  • Appearance:
    White to off-white Crystalline powder
  • Infrared spectrum:
    Conforms
  • Loss on drying:
    ≤0.4 % (105°C, 3 hrs)
  • Enantiomeric excess:
    ≤0.5 % (L-enantiomer)
  • Residue after ignition:
    ≤0.1 %
  • Specific optical rotation:
    -23.8° to -25.8° (20°C, 589 nm) (c=5, 5 N HCl)
  • Titration with NaOH:
    ≥99.0 %
  • Other amino acids:
    ≤0.3 % (TLC)

Specification Test Results

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