China H&Z® Buy Discount L-Proline is one of the most important amino acid in synthesis of body protein.It is also one of the important raw materials of amino acid infusion and synthesis of captopril and first-line antihypertensive such as the main intermediates.It has been widely used in food industries.
China Buy Discount L-Proline Factory
Buy Discount L-Proline CAS:147-85-3
Buy Discount 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
Buy Discount L-Proline CAS:147-85-3 Specification:
Buy Discount 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 |
/ |