Abstract: Compositions and methods are disclosed for sanitizing aqueous media, which combine a chlorine-source composition and a glycoluril-source composition. The compositions are added together or separately, continuously or periodically, and by any of a variety of methods. The glycoluril compound stabilizes the chlorine and prolongs its useful life as a microbicidal agent.

Abstract: This invention embodies compositions comprising herbicidally effective compounds corresponding to the formula ##STR1## in which R.sub.1 and R.sub.2 are independently methyl or ethyl,X is H, methyl, chlorine, bromine, fluorine;Y is chlorine, bromine, fluorine;andn is 0, 1 or 2and a non-phytotoxic antidotally effective amount of an antidote therefor selected from the group of amides of haloalkanoic acids, including oxazolidines and thiazolidines, aromatic oxime derivatives, thiazole carboxylic acids and derivatives, substituted phenylpyrimidines, 2-(dichloroacetyl)-2-methyl-1,3-dioxolane and 2-(dichloromethyl)-2-thiazoline.