5-Iodo-1-methylpyrazole CAS 34091-51-5

Purity 97%+In StockPharmaceutical Standards
CAS No.34091-51-5
Molecular FormulaC4H5IN2
Molecular Weight208.00 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Iodo-1-methylpyrazole CAS 34091-51-5 chemical structure

Description

5-Iodo-1-methylpyrazole (CAS 34091-51-5), molecular formula C4H5IN2 and molecular weight 208.00 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a nitrile group, iodine substitution, 5-Iodo-1-methylpyrazole is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 208.00 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC4H5IN2
Molecular Weight208.00 g/mol
AppearanceWhite to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor)
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.)1966
Halogen ContentI-containing
Nitrogen Atoms2

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