5-chloro-1-methyl-4-nitro-1H-pyrazole-3-carboxylic acid CAS 1909316-36-4

Purity 97%+In StockPharmaceutical Standards
CAS No.1909316-36-4
Molecular FormulaC5H4ClN3O4
Molecular Weight205.56 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-chloro-1-methyl-4-nitro-1H-pyrazole-3-carboxylic acid CAS 1909316-36-4 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 205.56 g/mol gives 5-chloro-1-methyl-4-nitro-1H-pyrazole-3-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

5-chloro-1-methyl-4-nitro-1H-pyrazole-3-carboxylic acid (CAS 1909316-36-4) is a high-purity analytical reference standard with the molecular formula C5H4ClN3O4 and a molecular weight of 205.56 g/mol.

Owing to a carbohydrate-derived structure, an amide group, chlorine substitution, 5-chloro-1-methyl-4-nitro-1H-pyrazole-3-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 205.56 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.

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 5-chloro-1-methyl-4-nitro-1H-pyrazole-3-carboxylic acid 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 FormulaC5H4ClN3O4
Molecular Weight205.56 g/mol
AppearanceOff-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1995
Halogen ContentCl-containing
Nitrogen Atoms3

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