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| L-proline is one of the essential amino acids for the human body, playing a key role in protein synthesis. It has a sweet taste and is highly soluble in water, and is widely used in the fields of medicine and food. Basic information L-Proline is a cyclic imine with the chemical formula C₅H₉NO₂ and a molecular weight of 115.13. At room temperature, it is a colorless to white crystal or powder with a slight odor and a slightly sweet taste. It is readily soluble in water and ethanol, but insoluble in organic solvents such as ether and butanol. Its melting point is 228-233℃, and its boiling point is 252.2℃ (760mmHg). | |||||||||
147-85-3
bosschemical
147-85-3
| L-Proline Basic information | |
| Product Name: | L-Proline |
| CAS: | 147-85-3 |
| MF: | C5H9NO2 |
| MW: | 115.13 |
| EINECS: | 205-702-2 |
| Mol File: | 147-85-3.mol |
| L-Proline Chemical Properties | |
| Melting point | 228 °C (dec.) (lit.) |
| alpha | -85.5 º (c=4, H2O) |
| Boiling point | 215.41°C (rough estimate) |
| density | 1.35 |
| FEMA | 3319 | L-PROLINE |
| refractive index | -85 ° (C=4, H2O) |
| storage temp. | 2-8°C |
| solubility | H2O: 50 mg/mL |
| pka | 1.95, 10.64(at 25℃) |
| form | powder |
| color | White |
| 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 |
| λmax | λ: 260 nm Amax: 0.05 |
| λ: 280 nm Amax: 0.05 | |
| Sensitive | Hygroscopic |
| JECFA Number | 1425 |
| Merck | 147,780 |
| BRN | 80810 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | ONIBWKKTOPOVIA-UHFFFAOYSA-N |
| CAS DataBase Reference | 147-85-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Proline(147-85-3) |
| EPA Substance Registry System | L-Proline (147-85-3) |
| Item | Result |
| Appearance | White to off-white powder |
| Assay | ≥99.5% |
| Loss on drying | NMT 0.2% |
| Ash | NMT 0.01% |
| Heavy Metal (Pb) | NMT 0.5 mg/kg |
| As | NMT 2.0 mg/kg |
