4-Chloro-5-methylpyrimidine CAS 51957-32-5

Purity 97%+In StockPharmaceutical Standards
CAS No.51957-32-5
Molecular FormulaC5H5ClN2
Molecular Weight128.56 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Chloro-5-methylpyrimidine CAS 51957-32-5 chemical structure

Description

The occurrence of 4-Chloro-5-methylpyrimidine is closely related to a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

4-Chloro-5-methylpyrimidine (CAS 51957-32-5) is a high-purity analytical reference standard with the molecular formula C5H5ClN2 and a molecular weight of 128.56 g/mol.

4-Chloro-5-methylpyrimidine (C5H5ClN2) 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.

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 FormulaC5H5ClN2
Molecular Weight128.56 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)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1971
Halogen ContentCl-containing
Nitrogen Atoms2

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