4-Bromo-2-methylbut-1-ene CAS 20038-12-4

Purity >95%In StockPharmaceutical Standards
CAS No.20038-12-4
Molecular FormulaC5H9Br
Molecular Weight149.03 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Bromo-2-methylbut-1-ene CAS 20038-12-4 chemical structure

Description

The occurrence of 4-Bromo-2-methylbut-1-ene is closely related to bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies 4-Bromo-2-methylbut-1-ene (CAS 20038-12-4), a certified reference material (molecular formula C5H9Br, MW 149.03 g/mol) for analytical method development and quality control.

4-Bromo-2-methylbut-1-ene (C5H9Br) contains bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 FormulaC5H9Br
Molecular Weight149.03 g/mol
Purity>95%
StorageStore at 2-8°C, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, acetonitrile, DMSO
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)1.0
CAS Registry Year (est.)1962
Halogen ContentBr-containing

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