Methyl ethyl ketone (MEK) Methyl ethyl ketone (MEK) CAS NO. 78-93-3 EC NO. 201-159-0 Synonym Butan-2-one Formula C2H5COCH3 Mol. weight 72.11 g/mol Send enquiry Beckmann-Kenko2023-08-25T13:36:46+02:00