N-Acetyl-S-Phenyl-L-Cysteine

Name: N-Acetyl-S-Phenyl-L-Cysteine
Brand: Vaqora Chemicals
SKU: VQ-039121

About N-Acetyl-S-Phenyl-L-Cysteine

Listed under CAS 4775-80-8, N-Acetyl-S-Phenyl-L-Cysteine is an impurity of Cysteine available from Vaqora Chemicals. The compound has the formula C11H13NO3S, corresponding to a molecular weight of 239.29 g/mol. Systematically, it is named (2R)-2-acetamido-3-phenylsulfanylpropanoic acid. Alternative names: S-Phenylmercapturic acid and Phenylmercapturic 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.

We offer N-Acetyl-S-Phenyl-L-Cysteine in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers 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	N-Acetyl-S-Phenyl-L-Cysteine
Catalogue No.	VQ-039121
CAS Number	4775-80-8
IUPAC name	(2R)-2-acetamido-3-phenylsulfanylpropanoic acid
Molecular formula	C₁₁H₁₃NO₃S
Molecular weight	239.29 g/mol
Exact mass	239.0616
Grade	Reference Standard
HSN code	38229090
InChIKey	CICOZWHZVMOPJS-JTQLQIEISA-N
SMILES	CC(=O)N[C@@H](CSC1=CC=CC=C1)C(=O)O
PubChem CID	2723735

Physical properties
Physical form	Solid
LogP (XLogP3)	1.4
H-bond donors / acceptors	2 / 4
TPSA	91.7 Å²
Synonyms	S-Phenylmercapturic acid, Phenylmercapturic acid, S-Phenyl-N-acetylcysteine, L-Cysteine, N-acetyl-S-phenyl-, 2-Acetamido-3-phenylthiopropanoic acid, (2S)-2-acetamido-3-phenylsulfanyl-propanoic acid, (2R)-2-acetamido-3-(phenylsulfanyl)propanoic acid, S-PMA, (R)-2-Acetamido-3-(phenylthio)propanoic acid, (2R)-2-acetamido-3-phenylsulfanyl-propanoic acid

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 N-Acetyl-S-Phenyl-L-Cysteine?

The CAS Registry Number of N-Acetyl-S-Phenyl-L-Cysteine is 4775-80-8. It is also known as S-Phenylmercapturic acid, Phenylmercapturic acid, S-Phenyl-N-acetylcysteine.

What is the molecular formula and molecular weight of N-Acetyl-S-Phenyl-L-Cysteine?

N-Acetyl-S-Phenyl-L-Cysteine has the molecular formula C11H13NO3S and a molecular weight of 239.29 g/mol. Its IUPAC name is (2R)-2-acetamido-3-phenylsulfanylpropanoic acid.

What is N-Acetyl-S-Phenyl-L-Cysteine used for?

N-Acetyl-S-Phenyl-L-Cysteine 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 N-Acetyl-S-Phenyl-L-Cysteine can I order?

We supply N-Acetyl-S-Phenyl-L-Cysteine 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 N-Acetyl-S-Phenyl-L-Cysteine?

Yes. Every lot of N-Acetyl-S-Phenyl-L-Cysteine 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 N-Acetyl-S-Phenyl-L-Cysteine be shipped internationally?

Yes. N-Acetyl-S-Phenyl-L-Cysteine 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.