PIPERAZIN  , a substance formed by the

action of sodium glycol on ethylene-diamine hydrochloride, consisting of small alkaline deliquescent crystals with a saline taste and soluble in water . It was originally introduced into medicine as a solvent for uric acid . When taken into the body the drug is partly oxidized and partly eliminated unchanged . Outside the body piperazin has a remarkable power of dissolving uric acid and producing a soluble urate, but in clinical experience it has not proved equally successful . Lycetol, lysidine and sidonal are bodies having similar action .