Alloxydim is a chemical compound. Its formula is . A member of the cyclohexenones, a methyl ester, and an ether, alloxydim is a post-emergence herbicide. Its sodium salt is a hygroscopic, water-soluble colorless solid. Synthesis. Alloxydim may be produced by a multi-step reaction from mesityl oxide with dimethyl malonate, butyryl chloride, and ethoxyamine. Uses. Alloxydim is a grass herbicide that acts by inhibiting acetyl-CoA carboxylase. It was developed by Nippon Soda in 1976 and used from 1978 to 1992 in Germany.