CAS Registry Number

CAS 5436-21-5 — 4,4-Dimethoxybutan-2-one

4,4-Dimethoxybutan-2-one is an organic ketone widely used as a synthetic intermediate in pharmaceuticals, agrochemicals, and fragrance production due to its reactivity in aldol condensations and other organic transformations. It appears as a colorless to pale yellow liquid with a mild odor, soluble in most organic solvents. CAS 5436-21-5, molecular formula CH3COCH2CH(OCH3)2, molecular weight 132.16 g/mol. Store at ambient temperature in airtight containers away from oxidizing agents. EU classification includes a warning signal word, with R-phrases for irritant effects. Molekula supplies 4,4-Dimethoxybutan-2-one from research to bulk quantities with full documentation and ISO 9001:2015 traceability.