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| CAS No.: | 609-36-9 |
|---|---|
| Name: | DL-Proline |
| Article Data: | 177 |
| Molecular Structure: | |
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| Formula: | C5H9NO2 |
| Molecular Weight: | 115.132 |
| Synonyms: | Acide 2-pyrrolidinecarboxylique;Proline, DL- (8CI);Acide pyrrolidine-2-carboxylique;(±)-Proline;2-Pyrrolidinylcarboxylic acid;DL-Pro;NSC 97923;(RS)-Proline;Proline; |
| EINECS: | 210-189-3 |
| Density: | 1.187 g/cm3 |
| Melting Point: | 208 °C (dec.)(lit.) |
| Boiling Point: | 252.2 °C at 760 mmHg |
| Flash Point: | 106.3 °C |
| Solubility: | SOLUBLE |
| Hazard Symbols: |
 Xn
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| Risk Codes: | 22-36/37/38 |
| Safety: | 22-24/25-36/37/39-26 |
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Specification
The CAS registry number of DL-Proline is 609-36-9. Its EINECS registry number is 210-189-3. The IUPAC name is pyrrolidine-2-carboxylic acid. In addition, the molecular formula is C5H9NO2 and the molecular weight is 115.13. It is also called Proline. What's more, it is a kind of white to off-white crystalline powder and belongs to the classes of Amino Acid Derivatives; Proline [Pro, P]; Amino Acids and Derivatives; alpha-Amino Acids; Amino Acids; Biochemistry; Amino Acids.
Physical properties about this chemical are: (1)ACD/BCF (pH 5.5): 1; (2)ACD/BCF (pH 7.4): 1; (3)ACD/KOC (pH 5.5): 1; (4)ACD/KOC (pH 7.4): 1; (5)#H bond acceptors: 3; (6)#H bond donors: 2; (7)#Freely Rotating Bonds: 1; (8)Polar Surface Area: 49.33 Å2; (9)Index of Refraction: 1.487; (10)Molar Refractivity: 27.902 cm3; (11)Molar Volume: 96.998 cm3; (12)Polarizability: 11.061 ×10-24cm3; (13)Surface Tension: 43.438 dyne/cm; (14)Density: 1.187 g/cm3; (15)Flash Point: 106.319 °C; (16)Enthalpy of Vaporization: 53.901 kJ/mol; (17)Boiling Point: 252.187 °C at 760 mmHg; (18)Vapour Pressure: 0.006 mmHg at 25°C.
Preparation of DL-Proline: it can be prepared by 1-trichloroacetyl-pyrrolidine-2-carboxylic acid methyl ester. This reaction will need reagent 20percent aq. KOH and solvent methanol. The yield is about 80% with ambient temperature.
Uses of DL-Proline: it can be used in biochemical and nutrition research, microbial test and the preparation of culture medium. And it can treat malnutrition, protein deficiency and severe gastrointestinal disease. It has no significant side effects. In addition, it can be used to get N-nitrosoproline. This reaction will need reagent [NO+*(18-crown-6)*H(NO3)2-] and solvent CH2Cl2. The reaction time is 5 minutes at reaction temperature of 20 °C. The yield is about 100%.
When you are using this chemical, please be cautious about it as the following:
This chemical is harmful if swallowed and irritating to eyes, respiratory system and skin. During using it, wear suitable protective clothing, gloves and eye/face protection and avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. In addition, you should not breathe dust.
You can still convert the following datas into molecular structure:
(1)SMILES: C1CC(NC1)C(=O)O
(2)InChI: InChI=1/C5H9NO2/c7-5(8)4-2-1-3-6-4/h4,6H,1-3H2,(H,7,8)
(3)InChIKey: ONIBWKKTOPOVIA-UHFFFAOYAS