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Amino acids and derivatives

(±)-Methionine

Also known as DL-Methionine, Racemethionine, Acimetion

CAS 59-51-8Formula C5H11NO2SMolar mass 149.22 g/molEC 200-432-1
231 suppliers listed
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(±)-Methionine chemical structure, C5H11NO2S, CAS 59-51-8
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Crystals
Density
Relative density (water = 1): 1.3
Solubility
Solubility in water, g/100ml at 20 °C: 4.8
HS code
293040
Category
Amino acids and derivatives
Illustrative photo, assorted laboratory chemical bottles and jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is (±)-Methionine?

Plain description, key identifiers and synonyms

Methionine is a sulfur-containing amino acid that is butyric acid bearing an amino substituent at position 2 and a methylthio substituent at position 4. It has a role as a Saccharomyces cerevisiae metabolite, a plant metabolite, an Escherichia coli metabolite, a Daphnia magna metabolite and an algal metabolite. It is a sulfur-containing amino acid and an alpha-amino acid. It is functionally related to a butyric acid. It is a conjugate base of a methioninium. It is a conjugate acid of a methioninate. It is a tautomer of a methionine zwitterion.

(±)-Methionine is a sulfur-containing amino acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-amino-4-methylsulfanylbutanoic acid
CAS number
59-51-8 CAS number cross-checkedOther or deprecated CAS: 26062-47-5, 33807-07-7, 348-67-4, 63-68-3, 7005-18-7
EC number
200-432-1
Molecular formula
C5H11NO2S
UNII
73JWT2K6T3
MDL number
MFCD00063096
INCI name
METHIONINE
InChIKey
FFEARJCKVFRZRR-UHFFFAOYSA-N
InChI
InChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)
SMILES (canonical and isomeric)
CSCCC(C(=O)O)N

Synonyms

  • DL-Methionine
  • Racemethionine
  • Acimetion
  • Lobamine
  • Urimeth
  • (+-)-Methionine
  • DL-Methioninum
  • Methionine, DL-
  • 2-amino-4-methylsulfanylbutanoic acid
  • 2-amino-4-(methylsulfanyl)butanoic acid
  • Methionine, amorphous
  • Methionine DL-
  • DL-2-Amino-4-(methylthio)-butyric acid
  • 2-azaniumyl-4-methylsulfanylbutanoate
  • Methionine, DL
  • DL-Isomer Methionine
  • 2-amino-4-methylsulfanylbutanoate, hydron
  • Mertionin
  • Pedameth
  • D,L-methionine
  • DL-2-Amino-4-(methylthio)butanoic acid
  • (+/-)-Methionine
  • Methionine dl-form
  • Methilonin
  • dl-methionin
Show all 38 synonyms
  • DL-2-Amino-4-(methylthio)butyric acid
  • DL-Methionine-1-13C
  • 2-amino-4-methylsulfanyl-butanoic acid
  • alpha-Amino-gamma-(methylthio)butyric acid
  • (+/-)-2-Amino-4-(methylmercapto)butyric acid
  • DL-Methionine (Racemethionine)
  • 2-Amino-4-methylthiobutanoic acid
  • 2-Amino-4-(methylmercapto)butyric acid
  • DL-Methionine (JAN)
  • Racemethionine (USAN)
  • S-Methyl-L-homocystein
  • H-DL-Met-OH
  • alpha-Amino-gamma-methylmercaptobutyric 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

Physical form
Crystalsexp.
Density
Relative density (water = 1): 1.3exp.
Solubility
Solubility in water, g/100ml at 20 °C: 4.8exp.

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
149.22 g/molcalc.
Exact mass
149.0511 Dacalc.
LogP (octanol/water)
0.15calc.
Topological polar surface area
63.32 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
9calc.
Rings
0calc.
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.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms

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

Full safety data and first aid

(±)-Methionine suppliers

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All 231 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

231 suppliers in 39 countries

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(±)-Methionine 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

Use classes: Enzymes and Enzyme Stabilizers, Safer Chemical Classes, Cosmetics.

Cosmetic ingredient, INCI name METHIONINE(antistatic, hair conditioning, skin conditioning)

Roles

  • Daphnia magna metabolite
  • Daphnia metabolite
  • Escherichia coli metabolite
  • Saccharomyces cerevisiae metabolite
  • algal metabolite
  • animal metabolite
  • bacterial metabolite
  • crustacean metabolite
  • eukaryotic metabolite
  • fungal metabolite
  • metabolite
  • plant metabolite
  • prokaryotic metabolite

Functional uses

  • Anti-static agent
  • Chemical reaction regulator
  • Flavouring and nutrient
  • Fragrance
  • Pharmaceutical
  • Softener and conditioner
  • Stabilizing agent

Cosmetic functions

  • Antistatic
  • Hair conditioning
  • Skin conditioning

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

United States

  • Safer Choice ingredient list (USA)
  • 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 (±)-Methionine is traded under.

HS 2930.40Indicative HS code

Methionine

World exports in 2024
$1.06B
+49.3% vs 2023, imports $2.16B
2019 to 2024
Top exporters
  1. China56.8%
  2. Malaysia17.4%
  3. France * partner reported8.7%
Top importers
  1. China17.4%
  2. Brazil7.6%
  3. Germany5.4%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about (±)-Methionine, based on the data on this page

What is (±)-Methionine?

Methionine is a sulfur-containing amino acid that is butyric acid bearing an amino substituent at position 2 and a methylthio substituent at position 4. It has a role as a Saccharomyces cerevisiae metabolite, a plant metabolite, an Escherichia coli metabolite, a Daphnia magna metabolite and an algal metabolite.

What is the CAS number of (±)-Methionine?

The CAS registry number of (±)-Methionine is 59-51-8. Other or deprecated CAS numbers: 26062-47-5, 33807-07-7, 348-67-4.

What is the molecular formula and weight of (±)-Methionine?

The molecular formula of (±)-Methionine is C5H11NO2S and its molar mass is 149.22 g/mol.

What is (±)-Methionine used for?

Use classes: Enzymes and Enzyme Stabilizers, Safer Chemical Classes, Cosmetics.

Is (±)-Methionine hazardous?

No GHS hazard classification for (±)-Methionine 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 (±)-Methionine?

(±)-Methionine is usually classified under HS code 293040 (Methionine). This is indicative, confirm it with your customs broker before shipping.

Where can I buy (±)-Methionine?

CompoundList lists 231 suppliers of (±)-Methionine in China, United States, India, Germany and 35 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy (±)-Methionine in India?

25 suppliers in India list (±)-Methionine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of (±)-Methionine?

Suppliers quote (±)-Methionine 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 (±)-Methionine

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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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