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API Impurities

S-Methyl-L-Cysteine-S-oxide

Reference StandardAvailable on request

S-Methyl-L-Cysteine-S-oxide (CAS 6853-87-8) supplier Zemixal. Request a quote with price, lead time and documents. Packs from 10 mg.

Pack sizes
S-Methyl-L-Cysteine-S-oxide chemical structure
CAS number6853-87-8
FormulaC4H9NO3S
Molar mass151.19 g/mol
Physical formSolid
HS code38229090
InChIKeyZZLHPCSGGOGHFW-BUKSALPDSA-N
IUPAC name(2R)-2-amino-3-methylsulfinylpropanoic acid

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

S-Methyl-L-Cysteine-S-oxide belongs to the Cysteine reference-standard family in the Zemixal catalogue. Key data (Reference Standard): CAS 6853-87-8, formula C4H9NO3S and molar mass 151.19 g/mol. It is handled as a solid.

Typical applications

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

Handling and storage

Classified under GHS with signal word Warning and hazard statements H315, H319 and H335. Read the SDS before first use.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. You receive a certificate of analysis with characterisation data with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Cysteine

See every impurity, metabolite and related compound we list for this API.

Cysteine standards

Typical uses

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

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Specifications and identifiers

Specifications of S-Methyl-L-Cysteine-S-oxide
Product nameS-Methyl-L-Cysteine-S-oxide
Catalogue numberZX-040371
CAS number6853-87-8
IUPAC name(2R)-2-amino-3-methylsulfinylpropanoic acid
Molecular formulaC4H9NO3S
Molar mass151.19 g/mol
Exact mass151.0303
GradeReference Standard
Physical formSolid
XLogP3-4.3
H-bond donors / acceptors2 / 5
Topological polar surface area99.6 Ų
HS code38229090
InChIKeyZZLHPCSGGOGHFW-BUKSALPDSA-N
SMILESCS(=O)C[C@@H](C(=O)O)N
PubChem CID182092
SynonymsS-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

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful

Signal word Warning

  • 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 summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of S-Methyl-L-Cysteine-S-oxide
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about S-Methyl-L-Cysteine-S-oxide

Which CAS number identifies S-Methyl-L-Cysteine-S-oxide?
S-Methyl-L-Cysteine-S-oxide is registered under CAS 6853-87-8. You may also see it listed as S-Methyl L-Cysteine, (2R)-2-Amino-3-(methylsulfinyl)propanoic acid, S-Methyl-L-cysteine sulfoxide. Our catalogue number for this item is ZX-040371.
What are the formula and molar mass of S-Methyl-L-Cysteine-S-oxide?
For S-Methyl-L-Cysteine-S-oxide, its formula is C4H9NO3S and its molar mass is 151.19 g/mol. The systematic (IUPAC) name is (2R)-2-amino-3-methylsulfinylpropanoic acid. InChIKey ZZLHPCSGGOGHFW-BUKSALPDSA-N lets you match it in any structure database.
How is S-Methyl-L-Cysteine-S-oxide used in pharmaceutical QC?
S-Methyl-L-Cysteine-S-oxide is a characterised reference material linked to Cysteine. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.
What grade and pack sizes are available for S-Methyl-L-Cysteine-S-oxide?
This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with S-Methyl-L-Cysteine-S-oxide?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship S-Methyl-L-Cysteine-S-oxide to my country?
Yes. Because S-Methyl-L-Cysteine-S-oxide is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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