L-Valine

L-Valine CP2020  EP11 USP2023
Assay ≥98.5% 98.5-101.0% 98.5-101.5%
PH 5.5-6.5 / 5.5-7.0
Specific rotation[a]D20 +26.6°-+28.8° +26.5°-+29.0° /
Specific rotation[a]D25 / / +26.6°-+28.8°
Transmittance(T430) ≥98.0% / /
Appearance of solution / clear & colorless ≤BY6 /
Chloride(Cl) ≤0.02% ≤0.02% ≤0.05%
Ammonium(NH4) ≤0.02% ≤0.02% /
Sulfate(SO4) ≤0.03% ≤0.03% ≤0.03%
Iron(Fe) ≤10PPM ≤10PPM ≤30PPM
Heavy metals(Pb) ≤10PPM / /
Arsenic ≤1PPM / /
Other amino acids ≤0.5% / individual impurities≤0.5%
total impurities≤2.0%
Ninhydrin-positive substances / Impurity B at 570 nm≤0.4%  
each impurity ≤0.2%
total ≤1.0%		 /
Loss on drying ≤0.20% ≤0.50% ≤0.30%
Residue on ignition ≤0.10% ≤0.10% ≤0.10%
Endotoxin <20EU/g <20EU/g <20EU/g
Total plate count ≤ 500 CFU/g ≤ 500 CFU/g ≤ 500 CFU/g
Moulds & Yeasts ≤ 50 CFU/g ≤ 50 CFU/g ≤ 50 CFU/g