4784-77-4 1-Bromobut-2-ene 2-Butene, 1-bromo- 1-Bromo-2-butene 2-Butenyl bromide Crotonyl bromide Crotyl bromide 1-Crotyl bromide EINECS 225-332-5 NSC 20942 CAS 4784-77-4

Purity 97%+In StockPharmaceutical Standards
CAS No.4784-77-4
Molecular FormulaC4H7Br
Molecular Weight135.00 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4784-77-4 1-Bromobut-2-ene 2-Butene, 1-bromo- 1-Bromo-2-butene 2-Butenyl bromide Crotonyl bromide Crotyl bromide 1-Crotyl bromide EINECS 225-332-5 NSC 20942 CAS 4784-77-4 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4784-77-4 1-Bromobut-2-ene 2-Butene, 1-bromo- 1-Bromo-2-butene 2-Butenyl bromide Crotonyl bromide Crotyl bromide 1-Crotyl bromide EINECS 225-332-5 NSC 20942.

CATO supplies 4784-77-4 1-Bromobut-2-ene 2-Butene, 1-bromo- 1-Bromo-2-butene 2-Butenyl bromide Crotonyl bromide Crotyl bromide 1-Crotyl bromide EINECS 225-332-5 NSC 20942 (CAS 4784-77-4), a certified reference material (molecular formula C4H7Br, MW 135.00 g/mol) for analytical method development and quality control.

Owing to bromine substitution, 4784-77-4 1-Bromobut-2-ene 2-Butene, 1-bromo- 1-Bromo-2-butene 2-Butenyl bromide Crotonyl bromide Crotyl bromide 1-Crotyl bromide EINECS 225-332-5 NSC 20942 is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 135.00 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 FormulaC4H7Br
Molecular Weight135.00 g/mol
Purity97%+
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.)1958
Halogen ContentBr-containing

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