3-Chloropropanoic Anhydride CAS 20495-99-2

Purity ≥95%In StockPharmaceutical Standards
CAS No.20495-99-2
Molecular FormulaC6H8Cl2O3
Molecular Weight199.03 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Chloropropanoic Anhydride CAS 20495-99-2 chemical structure

Description

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 3-Chloropropanoic Anhydride is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 199.03 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

CATO supplies 3-Chloropropanoic Anhydride (CAS 20495-99-2), a certified reference material (molecular formula C6H8Cl2O3, MW 199.03 g/mol) for analytical method development and quality control.

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 FormulaC6H8Cl2O3
Molecular Weight199.03 g/mol
Purity≥95%
StorageStore at 2-8°C, keep sealed and dry, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityHygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1962
Halogen ContentCl-containing

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