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Amino acids and derivatives

L-Alanine

Also known as alanine, (S)-Alanine, (2S)-2-Aminopropanoic acid

CAS 56-41-7Formula C3H7NO2Molar mass 89.09 g/molEC 200-273-8
232 suppliers listed
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L-Alanine chemical structure, C3H7NO2, CAS 56-41-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Orthorhombic crystals from water
Melting point
297 °C
Boiling point
250 °C
Density
1.432 g/cm³ at 22 °C
Solubility
In water, 1.64 × 10⁺⁵ mg/L at 25 °C
HS code
292249
Category
Amino acids and derivatives
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is L-Alanine?

Plain description, key identifiers and synonyms

L-alanine is the L-enantiomer of alanine. It has a role as an EC 4.3.1.15 (diaminopropionate ammonia-lyase) inhibitor and a fundamental metabolite. It is a L-alpha-amino acid, an alanine, a pyruvate family amino acid and a proteinogenic amino acid. It is a conjugate base of a L-alaninium. It is a conjugate acid of a L-alaninate. It is an enantiomer of a D-alanine. It is a tautomer of a L-alanine zwitterion.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-2-aminopropanoic acid
CAS number
56-41-7 CAS number cross-checkedOther or deprecated CAS: 115967-49-2, 130380-93-7, 18875-37-1, 25191-17-7, 26336-61-8, 302-72-7, 6898-94-8, 77160-91-9
EC number
200-273-8
Molecular formula
C3H7NO2
UNII
OF5P57N2ZX
MDL number
MFCD00064410
InChIKey
QNAYBMKLOCPYGJ-REOHCLBHSA-N
InChI
InChI=1S/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/t2-/m0/s1
Canonical SMILES
CC(N)C(=O)O
Isomeric SMILES
C[C@@H](C(=O)O)N

Synonyms

  • alanine
  • (S)-Alanine
  • (2S)-2-Aminopropanoic acid
  • L-alpha-alanine
  • (S)-2-Aminopropanoic acid
  • L-2-Aminopropionic acid
  • 2-Aminopropionic acid
  • L-(+)-Alanine
  • L-2-Aminopropanoic acid
  • L-alpha-Aminopropionic acid
  • (L)-Alanine
  • alpha-Aminopropionic acid
  • alanina
  • L-S-Aminopropionic acid
  • Alaninum
  • Alanine, l-
  • Propanoic acid, 2-amino-, (S)-
  • 2-Ammoniopropanoate
  • (2S)-2-aminopropanoate
  • l alanine
  • L-Isomer alanine
  • Alanine, L
  • (2S)-2-azaniumylpropanoate
  • 2-Aminopropanoate
  • 2-Aminopropanoic acid
Show all 36 synonyms
  • H-Ala-OH
  • alpha-Alanine
  • (S)-(+)-Alanine
  • L-2-Aminopropionsaeure
  • Alanine (VAN)
  • (S)-2-Aminopropionsaeure
  • 2-Aminopropanoic acid, L-
  • (S)-alpha-Aminopropionsaeure
  • Alanina [DCIT,Spanish]
  • L-a-Aminopropionic acid
  • L-Alanin

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

Appearance
Orthorhombic crystals from waterexp.
Odour
Odorlessexp.
Taste
Sweet tasteexp.
Melting point
297 °Cexp.
Boiling point
250 °Cexp.
Density
1.432 g/cm³ at 22 °Cexp.
Solubility
In water, 1.64 × 10⁺⁵ mg/L at 25 °Cexp.

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
89.09 g/molcalc.
Exact mass
89.0477 Dacalc.
LogP (octanol/water)
-0.58calc.
Topological polar surface area
63.32 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
6calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.67calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

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.

L-Alanine suppliers

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

All 232 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

232 suppliers in 28 countries

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L-Alanine 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

Microbiological & biochemical research.

Industrial uses: Intermediate, Chelating agent.

Consumer uses: Chelating agent.

Use classes: Cosmetics.

Roles

  • enzyme inhibitor
  • fundamental metabolite
  • metabolite

Functional uses

  • Flavouring and nutrient

Pharmacology

Alanine is an Amino Acid.

How it is made

Hydrolysis of protein (gelatin, silk, zein), org synthesis.

L-Alanine is produced via asymmetric hydrolysis with microbial acylase, and it is still isolated from protein hydrolysates on an industrially scale, L- alanine may be prepared...by enzymatic decarboxylation of L-aspartic acid with an immobilized microorganism such as Pseudomonas dacunhae.

L-Alanine is industrially produced from l-aspartic acid by means of immobilized Pseudomonas dacunhae cells in a pressurized bioreactor. In direct fermentation microorganisms usually accumulate d,l-alanine because of present alanine racemase.

Read more

With a d-cycloserine resistant mutant selected from Brevibacterium lactofermentum, it is possible to obtain 46 g/L d-alanine with an enantiomeric excess (e.e.) of 95 %. An alanine racemase-deficient mutant of Arthrobacter oxydans was reported, that produces 75 g/L l-alanine from glucose with a yield of 52 % and 95 % e.e. To a certain extent l-alanine is still isolated from protein hydrolysates.

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 L-Alanine is traded under.

HS 2922.49Indicative HS code

Amino-acids, other than those containing more than one kind of oxygen function, and…

World exports in 2024
$3.88B
−11.5% vs 2023, imports $3.87B
2019 to 2024
Top exporters
  1. China38.7%
  2. India * partner reported8.3%
  3. Germany8.1%
Top importers
  1. United States13.4%
  2. Germany11.1%
  3. Japan6.6%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about L-Alanine, based on the data on this page

What is L-Alanine?

L-alanine is the L-enantiomer of alanine. It has a role as an EC 4.3.1.15 (diaminopropionate ammonia-lyase) inhibitor and a fundamental metabolite. It is a L-alpha-amino acid, an alanine, a pyruvate family amino acid and a proteinogenic amino acid. It is a conjugate base of a L-alaninium.

What is the CAS number of L-Alanine?

The CAS registry number of L-Alanine is 56-41-7. Other or deprecated CAS numbers: 115967-49-2, 130380-93-7, 18875-37-1.

What is the molecular formula and weight of L-Alanine?

The molecular formula of L-Alanine is C3H7NO2 and its molar mass is 89.09 g/mol.

What is L-Alanine used for?

Microbiological & biochemical research. Industrial uses: Intermediate, Chelating agent. Consumer uses: Chelating agent. Use classes: Cosmetics.

Is L-Alanine hazardous?

No GHS hazard classification for L-Alanine 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 L-Alanine?

L-Alanine is usually classified under HS code 292249 (Amino-acids, other than those containing more than one kind of oxygen function, and…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy L-Alanine?

CompoundList lists 232 suppliers of L-Alanine in China, United States, India, Germany and 24 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy L-Alanine in India?

21 suppliers in India list L-Alanine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of L-Alanine?

Suppliers quote L-Alanine 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

Practical guides that help when you source, ship or handle L-Alanine

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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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