<unk> , sometimes known as ethanal, is an organic chemical compound with the formula CH3CHO or MeCHO.  It is a flammable liquid with a fruity smell.<unk>  occurs naturally in ripe fruit, coffee, and fresh bread and is produced by plants as part of their normal metabolism.  It is popularly known as the chemical that causes hangovers.
In the chemical industry,<unk>  is used as an intermediate in the production of<unk> tic acid, certain esters, and a number of other chemicals.  In 1989, US production stood at 740 million pounds (336,000 t). An important production method for<unk>  is the Wacker process.
Acetaldehyde
Meglutol
Alkane
Choline
Maleic acid
Metyrosine
Oxalate
Malate