4-(2-Bromoethylidene)tetrahydro-2H-pyran CAS 21378-20-1

Purity 97%+In StockPharmaceutical Standards
CAS No.21378-20-1
Molecular FormulaC7H11BrO
Molecular Weight191.07 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-(2-Bromoethylidene)tetrahydro-2H-pyran CAS 21378-20-1 chemical structure

Description

CATO supplies 4-(2-Bromoethylidene)tetrahydro-2H-pyran (CAS 21378-20-1), a certified reference material (molecular formula C7H11BrO, MW 191.07 g/mol) for analytical method development and quality control.

Owing to a hydroxyl group, an ether linkage, bromine substitution, 4-(2-Bromoethylidene)tetrahydro-2H-pyran is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 191.07 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.

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 FormulaC7H11BrO
Molecular Weight191.07 g/mol
Purity97%+
StorageStore at 2-8°C, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1963
Halogen ContentBr-containing

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