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L-Proline CAS 147-85-3

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).
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  • 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)
bulk density 500kg/m3
density 1.35
vapor pressure 0Pa at 25℃
refractive index -85 ° (C=4, H2O)
FEMA 3319 | L-PROLINE
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)
Odor at 100.00 %. odorless
Odor Type odorless
optical activity [α]20/D 85.0±1.0°, c = 5% in H2O
biological source synthetic
Water Solubility soluble
λmax λ: 260 nm Amax: 0.05
λ: 280 nm Amax: 0.05
Sensitive Hygroscopic
Merck 147,780
JECFA Number 1425
BRN 80810
Stability: Stable. Incompatible with strong oxidizing agents.
InChIKey ONIBWKKTOPOVIA-UHFFFAOYSA-N
LogP -2.54 at 20℃
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)

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