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Home/Compounds/CAS 3226-65-1
Formula C5H11NO3SMW 165.21Research-use catalog entryCOA/SDS by request

Methionine Sulfoxide

CAS Number: 3226-65-1

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Loading RDKit molecule structure...
InChIKey: QEFRNWWLZKMPFJ-YGVKFDHGSA-NC5H11NO3S | MW 165.21

Chemical Absolute Identifiers

CAS Number

3226-65-1

PubChem CID

158980

Molecular Formula

C5H11NO3S

Molecular Weight

165.21 g/mol

Exact Mass

165.045964

InChIKey

QEFRNWWLZKMPFJ-YGVKFDHGSA-N

IUPAC Name

(2S)-2-amino-4-methylsulfinylbutanoic acid

SMILES String

CS(=O)CC[C@@H](C(=O)O)N

Physical Properties

Melting Point

232–234 °C

Properties are provided as catalog reference data and may be confirmed through supplier documentation when required.

Catalog Facts

Structural features

Methionine Sulfoxide (CAS 3226-65-1) is listed in the Inhibitors and Agonists portfolio, with molecular formula C5H11NO3S and molecular weight 165. 21 g/mol.

Sourcing context

Catalog reference for RFQ preparation, supplier confirmation, and research chemical sourcing review.

Research use context

Intended for biochemical and pharmacology research workflows.

Documentation needs

COA/SDS status, availability, lead time, pack size, and shipment documentation can be confirmed during quotation.

Applications & Classification

Bioactivity ScreeningResearch intermediateCustom synthesis building blockResearch chemical sourcingCustom synthesis and catalog availability reviewCOA, SDS, pricing, and fulfillment workflow

Safety & Handling

Handling & Storage

  • Keep container tightly closed and dry.
  • Store in a well-ventilated place.

First Aid

  • Do not give anything to an unconscious person.
  • Rinse mouth with water.
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Fire Fighting

  • If necessary, wear a self-contained breathing apparatus for firefighting.

Accidental Release

  • Use personal protective equipment and emergency procedures.
  • Avoid dust generation.

For supplier-issued SDS, request documentation before handling, storage, shipment, or procurement decisions.

Preliminary Safety Reference

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Names & Synonyms / External Identifiers

Chemical Name

Methionine Sulfoxide

Names & Synonyms

L-methionine sulfoxideMethionine S-oxideL-methionine S-oxide(2S)-2-azaniumyl-4-methylsulfinylbutanoate(2S)-2-azanyl-4-methylsulfinyl-butanoic acid
Show all synonyms
2-Azaniumyl-4-methylsulfinylbutanoate2-amino-4-methanesulfinylbutanoic acid2-Amino-4-(methylsulfinyl)butanoic acid2-amino-4-methylsulfinylbutanoic acidButanoic acid, 2-amino-4-(methylsulfinyl)-Uethionine, S-oxideH-Met(O)-OH(2S)-2-amino-4-(methylsulfinyl)butanoic acidButanoic acid, 2-amino-4-(methylsulfinyl)-, (2S)-(2S)-2-amino-4-methanesulfinylbutanoic acidMet-SOL-2-Amino-4-(methylsulfinyl)butanoic acidL-Methionine, S-oxidemethioninesulfoxide
External Identifiers
EC NUMBER: 221-758-0DSSTOX SUBSTANCE ID: DTXSID20186012CHEMBL ID: CHEMBL445753CHEBI ID: CHEBI:17016UNII: XN1XVI4B2CHMDB ID: HMDB0002005KEGG ID: C02989METABOLOMICS WORKBENCH ID: 49887
Experimental Spectrum References
13C NMR Spectra1H NMR Spectra
Literature & Patent References
DOI 10.1016/j.bmc.2008.04.015Evaluation of the amino acid binding site of Mycobacterium tuberculosis glutamine synthetase for drug discovery.PMID 18462943Evaluation of the amino acid binding site of Mycobacterium tuberculosis glutamine synthetase for drug discovery.DOI 10.1016/j.bmcl.2004.04.072Synthesis of S-alkyl L-homocysteine analogues of glutathione and their kinetic studies with gamma-glutamyl transpeptidase.PMID 15177451Synthesis of S-alkyl L-homocysteine analogues of glutathione and their kinetic studies with gamma-glutamyl transpeptidase.

Documentation & Compliance Facts

Compliance Facts

Shipment review: Required

Documentation available by request

Certificate of Analysis (COA): By request

Supplier Safety Data Sheet (SDS): By request

Purity and pack size confirmation: By request

Availability and lead time review: Confirmed by RFQ

Shipment documentation review: By request

For supplier-issued documentation by request, use the RFQ actions on this page.Review preliminary safety reference

What happens after RFQ

  1. 1We review the CAS identity, quantity, and documentation request.
  2. 2We check sourcing options, supplier availability, COA/SDS, purity, pack size, and lead time.
  3. 3We review destination and shipment documentation needs when applicable.
  4. 4We follow up with a quotation or clarification request.

Text Reference Cues

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Non-public related references

(2S)-2-azaniumylhex-5-ynoateCAS 98891-36-2
N,S-DiacetylcysteineCAS 18725-37-6
Ibuprofen, (-)-CAS 51146-57-7
Cilastatin SodiumCAS 81129-83-1

Non-public references are shown as text only and do not imply equivalence, availability, or shared use.

Catalog navigation

Related Catalog Entries

Other public CAS pages in this catalog. These links support navigation across additional intermediates and do not imply equivalence, availability, or shared use.

CAS 98891-36-2(2S)-2-azaniumylhex-5-ynoateCAS 63-68-3L-MethionineCAS 56-86-0L-Glutamic AcidCAS 1002310-00-0Tert-butyl 1-(2-chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethylcarbamateCAS 1005174-17-3(E)-3-(2-Propyl-6-(trifluoromethyl)pyridin-3-yl)acrylic acidCAS 1018125-49-92-(3-Cyclopropyl-6-ethyl-4-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetic acidCAS 1018128-07-8Isopropyl 4-chloro-2-methylquinoline-6-carboxylateCAS 1018142-22-76-cyclopropyl-1-(2,2-difluoroethyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acidCAS 1018144-00-72-(3-Cyclopropyl-6-isopropyl-4-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetic acid

RFQ questions for CAS 3226-65-1

What are the key identifiers for Methionine Sulfoxide (CAS 3226-65-1)?

Methionine Sulfoxide is identified by CAS 3226-65-1, with molecular formula C5H11NO3S, molecular weight 165.21, InChIKey QEFRNWWLZKMPFJ-YGVKFDHGSA-N.

Can I request a COA for CAS 3226-65-1?

Yes. Submit an RFQ and specify COA requirements. Lot-specific COA depends on supplier confirmation.

Can I request supplier SDS for Methionine Sulfoxide?

Yes. Supplier SDS can be requested through the RFQ workflow before handling, storage, shipment, or procurement decisions.

Is CAS 3226-65-1 available for quotation?

Availability, pack size, lead time, and pricing are confirmed through RFQ.

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