4-Chloro-1h-pyrazole-3-carbonyl chloride CAS 717871-75-5

Purity 97%+In StockPharmaceutical Standards
CAS No.717871-75-5
Molecular FormulaC4H2Cl2N2O
Molecular Weight164.98 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Chloro-1h-pyrazole-3-carbonyl chloride CAS 717871-75-5 chemical structure

Description

The occurrence of 4-Chloro-1h-pyrazole-3-carbonyl chloride is closely related to an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

4-Chloro-1h-pyrazole-3-carbonyl chloride (CAS 717871-75-5) is a high-purity analytical reference standard with the molecular formula C4H2Cl2N2O and a molecular weight of 164.98 g/mol.

4-Chloro-1h-pyrazole-3-carbonyl chloride (C4H2Cl2N2O) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

CATO manufactures 4-Chloro-1h-pyrazole-3-carbonyl chloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC4H2Cl2N2O
Molecular Weight164.98 g/mol
AppearanceOff-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility)
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)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1985
Halogen ContentCl-containing
Nitrogen Atoms2

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