S-Methyl-L-Cysteine-S-oxide

Name: S-Methyl-L-Cysteine-S-oxide
Brand: Vaqora Chemicals
SKU: VQ-050301

About S-Methyl-L-Cysteine-S-oxide

Listed under CAS 6853-87-8, S-Methyl-L-Cysteine-S-oxide is an impurity of Cysteine available from Vaqora Chemicals. Its molecular formula is C4H9NO3S and its molecular weight is 151.19 g/mol. Systematically, it is named (2R)-2-amino-3-methylsulfinylpropanoic acid. It is also known as S-Methyl L-Cysteine or (2R)-2-Amino-3-(methylsulfinyl)propanoic acid.

The product is provided as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Pharmaceutical QC and development laboratories use this impurity standard of Cysteine to develop and validate HPLC methods, to set specification limits and to document impurity profiles in ANDA and DMF submissions. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, S-Methyl-L-Cysteine-S-oxide is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Cysteine

View every impurity, metabolite and intermediate we list for Cysteine.

Cysteine impurities

Specifications & identifiers

Chemical identifiers
Product name	S-Methyl-L-Cysteine-S-oxide
Catalogue No.	VQ-050301
CAS Number	6853-87-8
IUPAC name	(2R)-2-amino-3-methylsulfinylpropanoic acid
Molecular formula	C₄H₉NO₃S
Molecular weight	151.19 g/mol
Exact mass	151.0303
Grade	Reference Standard
HSN code	38229090
InChIKey	ZZLHPCSGGOGHFW-BUKSALPDSA-N
SMILES	CS(=O)C[C@@H](C(=O)O)N
PubChem CID	182092

Physical properties
Physical form	Solid
LogP (XLogP3)	-4.3
H-bond donors / acceptors	2 / 5
TPSA	99.6 Å²
Synonyms	S-Methyl L-Cysteine, (2R)-2-Amino-3-(methylsulfinyl)propanoic acid, S-Methyl-L-cysteine sulfoxide, S-Methylcysteine S-oxide, S-Methyl-L-Cysteine Sulphoxide, Methyl alliin, (methylsulfinyl)-D-alanine, S-Methylcysteine sulfoxide, (2R)-2-Amino-3-methylsulfinyl-propanoic acid, (R)-2-Amino-3-((S)-methylsulfinyl)propanoicacid, 3-(methylsulfinyl)-L-alanine, S-Methy

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of S-Methyl-L-Cysteine-S-oxide?

The CAS Registry Number of S-Methyl-L-Cysteine-S-oxide is 6853-87-8. It is also known as S-Methyl L-Cysteine, (2R)-2-Amino-3-(methylsulfinyl)propanoic acid, S-Methyl-L-cysteine sulfoxide.

What is the molecular formula and molecular weight of S-Methyl-L-Cysteine-S-oxide?

S-Methyl-L-Cysteine-S-oxide has the molecular formula C4H9NO3S and a molecular weight of 151.19 g/mol. Its IUPAC name is (2R)-2-amino-3-methylsulfinylpropanoic acid.

What is S-Methyl-L-Cysteine-S-oxide used for?

S-Methyl-L-Cysteine-S-oxide is supplied as a characterised reference material related to Cysteine. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of S-Methyl-L-Cysteine-S-oxide can I order?

We supply S-Methyl-L-Cysteine-S-oxide in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with S-Methyl-L-Cysteine-S-oxide?

Yes. Every lot of S-Methyl-L-Cysteine-S-oxide is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can S-Methyl-L-Cysteine-S-oxide be shipped internationally?

Yes. S-Methyl-L-Cysteine-S-oxide is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.