5-Methylisothiazol-3(2H)-one CAS 2825-29-8

Purity 97%+In StockPharmaceutical Standards
CAS No.2825-29-8
Molecular FormulaC4H5NOS
Molecular Weight115.15 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Methylisothiazol-3(2H)-one CAS 2825-29-8 chemical structure

Description

5-Methylisothiazol-3(2H)-one (CAS 2825-29-8), molecular formula C4H5NOS and molecular weight 115.15 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C4H5NOS, 5-Methylisothiazol-3(2H)-one contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 115.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 FormulaC4H5NOS
Molecular Weight115.15 g/mol
Purity97%+
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)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1957
Nitrogen Atoms1
Sulfur Atoms1

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Why CATO?