DL-Cysteine CAS 3374-22-9

Purity >95%In StockPharmaceutical Standards
CAS No.3374-22-9
Molecular FormulaC3H7NO2S
Molecular Weight121.16 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

DL-Cysteine CAS 3374-22-9 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 121.16 g/mol gives DL-Cysteine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies DL-Cysteine (CAS 3374-22-9), a certified reference material (molecular formula C3H7NO2S, MW 121.16 g/mol) for analytical method development and quality control.

The molecular framework of DL-Cysteine (C3H7NO2S) 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.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

CATO manufactures DL-Cysteine under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC3H7NO2S
Molecular Weight121.16 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)1.0
CAS Registry Year (est.)1957
Nitrogen Atoms1
Sulfur Atoms1

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