5-Methyl-4-oxo-1,4-dihydrothieno[2,3-d]pyrimidine-6-sulfonyl chloride CAS 1211760-98-3

Description

The occurrence of 5-Methyl-4-oxo-1,4-dihydrothieno[2,3-d]pyrimidine-6-sulfonyl chloride is closely related to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

5-Methyl-4-oxo-1,4-dihydrothieno[2,3-d]pyrimidine-6-sulfonyl chloride (CAS 1211760-98-3), molecular formula C7H5ClN2O3S2 and molecular weight 264.71 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 5-Methyl-4-oxo-1,4-dihydrothieno[2,3-d]pyrimidine-6-sulfonyl chloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 264.71 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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

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