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Amino acids and derivatives

Proline DL-form

Also known as Proline, DL-, 2-Pyrrolidinylcarboxylic acid, (+-)-proline

CAS 609-36-9Formula C5H9NO2Molar mass 115.13 g/molEC 210-189-3
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Proline DL-form chemical structure, C5H9NO2, CAS 609-36-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
609-36-9
Formula
C5H9NO2
Molar mass
115.13 g/mol
EC number
210-189-3
HS code
293399
Category
Amino acids and derivatives

What is Proline DL-form?

Plain description, key identifiers and synonyms

Proline is an alpha-amino acid that is pyrrolidine bearing a carboxy substituent at position 2. It has a role as a human metabolite and a Daphnia magna metabolite. It is an alpha-amino acid and a member of pyrrolidines. It is a conjugate base of a prolinium. It is a conjugate acid of a prolinate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
pyrrolidine-2-carboxylic acid
CAS number
609-36-9 CAS number cross-checkedOther or deprecated CAS: 147-85-3, 25191-13-3, 64298-80-2, 7005-20-1
EC number
210-189-3
Molecular formula
C5H9NO2
UNII
DCS9E77JPQ
MDL number
MFCD00005250
InChIKey
ONIBWKKTOPOVIA-UHFFFAOYSA-N
InChI
InChI=1S/C5H9NO2/c7-5(8)4-2-1-3-6-4/h4,6H,1-3H2,(H,7,8)
SMILES (canonical and isomeric)
C1CC(NC1)C(=O)O

Synonyms

  • Proline, DL-
  • 2-Pyrrolidinylcarboxylic acid
  • (+-)-proline
  • DL-Proline
  • pyrrolidine-2-carboxylic acid
  • H-DL-Pro-OH
  • D-Pyrrolidine-2-carboxylic acid
  • 2-Pyrrolidine carboxylic acid
  • Hpro
  • DL-Pyrrolidine-2-carboxylic acid
  • (+/-)-Pyrrolidine-2-carboxylic acid
  • L-Proline homopolymer
  • DL proline
  • D,L-proline
  • d,1-proline
  • Proline #
  • 10-proline
  • CCCu
  • (+/-)-proline
  • Proline,(l)
  • L-Proline, u.s.p.
  • L-Proline, non-animal origin
  • DL-2-Pyrrolidinecarboxylic acid
  • DL-2-Pyrrolidinocarboxylic acid
  • 2-Pyrralidinecarboxylic acid, (S)-
Show all 30 synonyms
  • DL-Proline, ReagentPlus(R), 99%
  • (R,S)-Pyrrolidine-2-carboxylic acid
  • (S)-Pyrrolidine-2-carboxylic acid solution
  • DL-Proline, Vetec(TM) reagent grade, 98%
  • D-(+)-Proline, D-Pyrrolidine-2-carboxylic acid

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
115.13 g/molcalc.
Exact mass
115.0633 Dacalc.
LogP (octanol/water)
-0.18calc.
Topological polar surface area
49.33 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
8calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.8calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1CCNC1

C1CCNC1

1 ring, 5 atoms, the Pyrrolidine ring system.

22,348 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Proline DL-form suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 108 suppliers
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Where suppliers are based

108 suppliers in 14 countries

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Proline DL-form price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Roles

  • Daphnia magna metabolite
  • Daphnia metabolite
  • animal metabolite
  • crustacean metabolite
  • eukaryotic metabolite
  • human metabolite
  • mammalian metabolite
  • metabolite

Functional uses

  • Softener and conditioner

Pharmacology

DL-Proline is a racemic mixture of proline, an imino acid. Proline is found in cartilage and is important for maintaining youthful skin as well as repair of muscle, connective tissue and skin damage. It is also essential for the immune system and an essential component of collagen and is important for proper functioning of joints and tendons. Proline is important for the proper functioning of joints and tendons and helps maintain and strengthen heart muscles.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Proline DL-form is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Proline DL-form is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Proline DL-form, based on the data on this page

What is Proline DL-form?

Proline is an alpha-amino acid that is pyrrolidine bearing a carboxy substituent at position 2. It has a role as a human metabolite and a Daphnia magna metabolite. It is an alpha-amino acid and a member of pyrrolidines. It is a conjugate base of a prolinium. It is a conjugate acid of a prolinate.

What is the CAS number of Proline DL-form?

The CAS registry number of Proline DL-form is 609-36-9. Other or deprecated CAS numbers: 147-85-3, 25191-13-3, 64298-80-2.

What is the molecular formula and weight of Proline DL-form?

The molecular formula of Proline DL-form is C5H9NO2 and its molar mass is 115.13 g/mol.

What is Proline DL-form used for?

Known uses and roles of Proline DL-form include daphnia magna metabolite, daphnia metabolite, animal metabolite, crustacean metabolite, eukaryotic metabolite and 4 more.

Is Proline DL-form hazardous?

No GHS hazard classification for Proline DL-form is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Proline DL-form?

Proline DL-form is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Proline DL-form?

CompoundList lists 108 suppliers of Proline DL-form in China, United States, Germany, United Kingdom and 10 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Proline DL-form in India?

3 suppliers in India list Proline DL-form on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Proline DL-form?

Suppliers quote Proline DL-form on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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