4-Chloro-3-methyl-1H-pyrazole CAS 15878-08-7

Purity 97%+In StockPharmaceutical Standards
CAS No.15878-08-7
Molecular FormulaC4H5ClN2
Molecular Weight116.55 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Chloro-3-methyl-1H-pyrazole CAS 15878-08-7 chemical structure

Description

As a certified reference material (CRM), 4-Chloro-3-methyl-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.

4-Chloro-3-methyl-1H-pyrazole (CAS 15878-08-7), molecular formula C4H5ClN2 and molecular weight 116.55 g/mol, is a CATO reference standard with documented purity and traceability.

4-Chloro-3-methyl-1H-pyrazole (C4H5ClN2) contains a nitrile group, chlorine 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.

Physical & Chemical Properties

Molecular FormulaC4H5ClN2
Molecular Weight116.55 g/mol
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.)1961
Halogen ContentCl-containing
Nitrogen Atoms2

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