L-Glutamic Acid CP2020  EP11 USP2023
Assay ≥98.5% 98.5-100.5% 98.5-101.5%
PH / / /
Specific rotation[a]D20 +31.5°-+32.5° +30.5°-+32.5° +31.5°-+32.5°
Specific rotation[a]D25 / / /
Transmittance(T430) ≥98.0% / /
Appearance of solution / clear & colorless /
Chloride(Cl) ≤0.02% ≤0.02% ≤0.02%
Ammonium(NH4) ≤0.02% ≤0.02% /
Sulfate(SO4) ≤0.02% ≤0.03% ≤0.02%
Iron(Fe) ≤5PPM  ≤10PPM ≤10PPM 
Heavy metals(Pb) ≤10PPM / /
Arsenic ≤1PPM / /
Other amino acids ≤0.50% / individual impurities≤0.5%
total impurities≤2.0%
Ninhydrin-positive substances / conform /
Loss on drying ≤0.50% ≤0.50% ≤0.10%
Residue on ignition ≤0.10% ≤0.10% ≤0.10%
Endotoxin conform conform conform
Total plate count ≤ 500 CFU/g ≤ 500 CFU/g ≤ 500 CFU/g
Moulds & Yeasts ≤ 50 CFU/g ≤ 50 CFU/g ≤ 50 CFU/g