Sigma-Aldrich 24004 Diethyl ether puriss., contains ~5 mg/L 2,6-di-tert.-butyl-4-methylphenol as stabilizer, meets analytical specification of Ph. Eur., BP, ≥99.5% (GC) Linear Formula: (CH3CH2)2O CAS Number: 60-29-7 Molecular Weight: 74.12