S-Phenyl-L-cysteine CAS 34317-61-8

Purity >95%In StockPharmaceutical Standards
CAS No.34317-61-8
Molecular FormulaC9H17NO2S
Molecular Weight203.30 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

S-Phenyl-L-cysteine CAS 34317-61-8 chemical structure

Description

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

S-Phenyl-L-cysteine (CAS 34317-61-8) is a high-purity analytical reference standard with the molecular formula C9H17NO2S and a molecular weight of 203.30 g/mol.

The molecular framework of S-Phenyl-L-cysteine (C9H17NO2S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC9H17NO2S
Molecular Weight203.30 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1966
Nitrogen Atoms1
Sulfur Atoms1

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