CN

L-Proline

Molecular Formula: C5H9NO2 

Molecular Weight: 115.13 

CAS No: 147-85-3

L-ProlineCP2020EP11USP2023AJI92
Assay≥99.0%98.5-101.0%98.5-101.5%99.0-101.0%
PH5.9-6.9//5.9-6.9
Specific rotation[a]D20-84.5°--86.0°-84.0°--86.0°/-84.5°--86.0°
Specific rotation[a]D25//-84.3°--86.3°/
Transmittance(T430)≥98.0%//≥98.0%
Appearance of solution/clear & colorless//
Chloride(Cl)≤0.02%≤0.02%≤0.05%≤0.02%
Ammonium(NH4)≤0.02%≤0.02%/≤0.02%
Sulfate(SO4)≤0.02%≤0.03%≤0.03%≤0.02%
Iron(Fe)≤10PPM≤10PPM≤30PPM≤10PPM
Heavy metals(Pb)≤10PPM//≤10PPM
Arsenic≤1PPM//≤1PPM
Other amino acids≤0.5%/Individual impurities≤0.5%
Total impurities≤2.0%
Individual impurities≤0.5%
Total impurities≤2.0%
Ninhydrin-positive substances/Each impurity≤0.2% 
Total impurities≤0.5%
//
Loss on drying≤0.30%≤0.50%≤0.4%≤0.30%
Residue on ignition≤0.10%≤0.10%≤0.4%≤0.10%
Total plate count≤ 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