4-Bromo-1-(tert-butyl)-1H-pyrazole CAS 70951-85-8

Purity 97%+In StockPharmaceutical Standards
CAS No.70951-85-8
Molecular FormulaC7H11BrN2
Molecular Weight203.08 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Bromo-1-(tert-butyl)-1H-pyrazole CAS 70951-85-8 chemical structure

Description

The occurrence of 4-Bromo-1-(tert-butyl)-1H-pyrazole is closely related to a nitrile group, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies 4-Bromo-1-(tert-butyl)-1H-pyrazole (CAS 70951-85-8), a certified reference material (molecular formula C7H11BrN2, MW 203.08 g/mol) for analytical method development and quality control.

Based on its molecular formula C7H11BrN2, 4-Bromo-1-(tert-butyl)-1H-pyrazole contains a nitrile group, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 203.08 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

As a certified reference material (CRM), 4-Bromo-1-(tert-butyl)-1H-pyrazole meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC7H11BrN2
Molecular Weight203.08 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 tightly closed to prevent evaporation
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1977
Halogen ContentBr-containing
Nitrogen Atoms2

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