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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Model:
147-85-3
Brand:
futurechemical
Code:
147-85-3

Product Description

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
λmax	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)

L-Proline 147-85-3 C₅H₉NO₂ Cosmetic anti-aging agent Food nutrient fortifier

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.