China L-Proline Factory
L-Proline CAS:147-85-3
L-Proline Chemical Properties
MF:C5H9NO2
MW:115.13
EINECS:205-702-2
Melting point:228 °C (dec.)(lit.)
alpha:-85.5 º (c=4, H2O)
Boiling point:215.41°C (rough estimate)
Density:1.35
Refractive index:-85 ° (c=4, h2o)
Solubilityh2o: 50 mg/ml
Pka:1.95, 10.64(at 25℃)
Ph:6.0-7.0 (25℃, 1m in h2o)
Optical activity:[α]20/D 85.0±1.0°, c = 5% in H2O
Water Solubility :soluble
L-Proline CAS:147-85-3 Specification:
L-Proline |
AJI92 |
Europe index |
First grade |
USA index |
Assay |
99.0-101.0% |
98.5-101.0% |
≥99.0% |
98.5-101.5% |
PH |
5.9-6.9 |
/ |
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% |
clear & colorless |
≥98.0% |
/ |
Chloride(Cl) |
≤0.02% |
≤0.02% |
≤0.02% |
≤0.05% |
Ammonium(NH4) |
≤0.02% |
≤0.02% |
≤0.02% |
|
Sulfate(SO4) |
≤0.02% |
≤0.03% |
≤0.02% |
≤0.03% |
Iron(Fe) |
≤10PPM |
≤10PPM |
≤10PPM |
/ |
Heavy metals(Pb) |
≤10PPM |
≤10PPM |
≤10PPM |
≤15PPM |
Arsenic |
≤1PPM |
/ |
≤1PPM |
|
Other amino acids |
individual impurities≤0.5% total impurities≤2.0% |
individual impurities≤0.20% total impurities≤0.5% |
≤0.5% |
individual impurities≤0.5% total impurities≤2.0% |
Ninhydrin-positive substances |
/ |
conform |
/ |
|
Loss on drying |
≤0.30% |
≤0.50% |
≤0.30% |
≤0.4% |
Residue on ignition |
≤0.10% |
≤0.10% |
≤0.10% |
≤0.4% |
Organic volatile impurities |
/ |
/ |
/ |
/ |
Endotoxin |
/ |
/ |
<10EU/g |
/ |