4-Bromo-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid-1-oxyl CAS 78033-69-9

Purity 97%+In StockPharmaceutical Standards
CAS No.78033-69-9
Molecular FormulaC9H14BrNO3
Molecular Weight264.12 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Bromo-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid-1-oxyl CAS 78033-69-9 chemical structure

Description

The occurrence of 4-Bromo-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid-1-oxyl is closely related to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

4-Bromo-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid-1-oxyl (CAS 78033-69-9) is a high-purity analytical reference standard with the molecular formula C9H14BrNO3 and a molecular weight of 264.12 g/mol.

4-Bromo-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid-1-oxyl (C9H14BrNO3) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.

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 FormulaC9H14BrNO3
Molecular Weight264.12 g/mol
AppearanceWhite to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1979
Halogen ContentBr-containing
Nitrogen Atoms1

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