Dl-Methionine CAS 59-51-8

Purity >95%In StockPharmaceutical Standards
CAS No.59-51-8
Molecular FormulaC5H11NO2S
Molecular Weight149.21 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Dl-Methionine CAS 59-51-8 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Dl-Methionine.

Dl-Methionine (CAS 59-51-8), molecular formula C5H11NO2S and molecular weight 149.21 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, Dl-Methionine (C5H11NO2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 1.0, corresponding to approximately 1 ring(s) or double-bond equivalent(s). With a molecular weight of 149.21 g/mol, it falls into the low-molecular-weight range. 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.

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 FormulaC5H11NO2S
Molecular Weight149.21 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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Why CATO?