D-Cysteine CAS 921-01-7

Purity >95%In StockPharmaceutical Standards
CAS No.921-01-7
Molecular FormulaC3H7NO2S
Molecular Weight121.16 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

D-Cysteine CAS 921-01-7 chemical structure

Description

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

CATO supplies D-Cysteine (CAS 921-01-7), a certified reference material (molecular formula C3H7NO2S, MW 121.16 g/mol) for analytical method development and quality control.

Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, D-Cysteine is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 121.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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

CATO manufactures D-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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