L-Isoleucine

Molecular Formula: C6H13NO2

Molecular Weight: 131.17

CAS No： 73-32-5

L-Isoleucine CP2020 EP11 USP2023 USP24 FCC11
Assay ≥98.5% 98.5-101.0% 98.5-101.5% 98.5-101.5% 98.5～101.5%
PH 5.5-6.5 / 5.5-7.0 5.5-7.0 5.5-7.0
Specific rotation[a]D20 +38.9°-+41.8° +40.0-+43.0 / / +38.6～+41.5°
Specific rotation[a]D25 / / +38.9°-+41.8° +38.9°-+41.8° +38.2～+41.1°
Transmittance(T430) ≥98.0% / / / /
Appearance of solution / clear & colorless ≤BY6 / / /
Chloride(Cl) ≤0.02% ≤0.02% ≤0.05% ≤0.05% /
Ammonium(NH4) ≤0.02% ≤0.02% / / /
Sulfate(SO4) ≤0.02% ≤0.03% ≤0.03% ≤0.03% /
Iron(Fe) ≤10PPM ≤10PPM ≤30PPM ≤30PPM /
Heavy metals(Pb) ≤10PPM / / ≤15PPM /
Arsenic ≤1PPM / / / /
Lead / / / / ≤ 5 ppm
Other amino acids ≤0.5% /

Individual impurities≤0.5%  

Total impurities≤2.0%

 / /
Ninhydrin-positive substances / Impurities A and C at 570 nm≤ 0.3%
Each impruity ≤0.2%
Total ≤1.0%		 / / /
Loss on drying ≤0.20% ≤0.5% ≤0.30% ≤0.30% ≤0.30%
Residue on ignition ≤0.10% ≤0.10% ≤0.30% ≤0.30% ≤0.20%
Insoluble foreign matter / / / / ≤50 ppm
Organic volatile impurities / / / conforms /
Endotoxin ＜20EU/g ＜20EU/g ＜20EU/g / /
Total plate count ≤ 1000 CFU/g ≤ 1000 CFU/g ≤ 1000 CFU/g ≤ 1000 CFU/g ≤ 1000 CFU/g
Moulds & Yeasts ≤ 100 CFU/g ≤ 100 CFU/g ≤ 100 CFU/g ≤ 100 CFU/g ≤ 100 CFU/g