3-(5-Chlorothiophen-2-yl)-1H-pyrazole CAS 166196-61-8

Purity 97%+In StockPharmaceutical Standards
CAS No.166196-61-8
Molecular FormulaC7H5ClN2S
Molecular Weight184.65 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-(5-Chlorothiophen-2-yl)-1H-pyrazole CAS 166196-61-8 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 3-(5-Chlorothiophen-2-yl)-1H-pyrazole.

CATO supplies 3-(5-Chlorothiophen-2-yl)-1H-pyrazole (CAS 166196-61-8), a certified reference material (molecular formula C7H5ClN2S, MW 184.65 g/mol) for analytical method development and quality control.

Owing to a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system, 3-(5-Chlorothiophen-2-yl)-1H-pyrazole is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 184.65 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.

CATO manufactures 3-(5-Chlorothiophen-2-yl)-1H-pyrazole 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 FormulaC7H5ClN2S
Molecular Weight184.65 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)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2004
Halogen ContentCl-containing
Nitrogen Atoms2
Sulfur Atoms1

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