Methyl 2-ethynylcyclopropanecarboxylate CAS 35856-20-3

Purity 97%+In StockPharmaceutical Standards
CAS No.35856-20-3
Molecular FormulaC7H8O2
Molecular Weight124.14 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Methyl 2-ethynylcyclopropanecarboxylate CAS 35856-20-3 chemical structure

Description

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.

Methyl 2-ethynylcyclopropanecarboxylate (CAS 35856-20-3) is a high-purity analytical reference standard with the molecular formula C7H8O2 and a molecular weight of 124.14 g/mol.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Methyl 2-ethynylcyclopropanecarboxylate is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 124.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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.

Physical & Chemical Properties

Molecular FormulaC7H8O2
Molecular Weight124.14 g/mol
Purity97%+
StorageStore at 2-8°C
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1967

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