But-2-yne-1-sulfonyl chloride CAS 1342209-39-5

Purity 97%+In StockPharmaceutical Standards
CAS No.1342209-39-5
Molecular FormulaC4H5ClO2S
Molecular Weight152.60 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

But-2-yne-1-sulfonyl chloride CAS 1342209-39-5 chemical structure

Description

But-2-yne-1-sulfonyl chloride (CAS 1342209-39-5) is a high-purity analytical reference standard with the molecular formula C4H5ClO2S and a molecular weight of 152.60 g/mol.

Based on its molecular formula C4H5ClO2S, But-2-yne-1-sulfonyl chloride contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 152.60 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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.

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 FormulaC4H5ClO2S
Molecular Weight152.60 g/mol
Purity97%+
StorageStore at 2-8°C, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityContains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1991
Halogen ContentCl-containing
Sulfur Atoms1

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