4,5-Dichlorothiazole CAS 16629-16-6

Purity 97%+In StockPharmaceutical Standards
CAS No.16629-16-6
Molecular FormulaC3HCl2NS
Molecular Weight154.02 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4,5-Dichlorothiazole CAS 16629-16-6 chemical structure

Description

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.

4,5-Dichlorothiazole (CAS 16629-16-6) is a high-purity analytical reference standard with the molecular formula C3HCl2NS and a molecular weight of 154.02 g/mol.

Owing to a nitrile group, sulfur-containing functionality, chlorine substitution, 4,5-Dichlorothiazole is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 154.02 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

As a certified reference material (CRM), 4,5-Dichlorothiazole 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 FormulaC3HCl2NS
Molecular Weight154.02 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, acetonitrile, DMSO
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 Atoms1
Sulfur Atoms1

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