Abstract: The present invention is directed to a novel process for manufacturing tablets of N-halohydantoin compounds. In the process, at least one dry, particulate N-halohydantoin compound is blended with a dry, particulate alkali metal or alkaline earth salt to form a dry mixture, and the mixture is compacted into densified forms such as tablets. Dry particulate alkali metal or alkaline earth salts consist of a cation selected from among the group comprising lithium, sodium, potassium, magnesium and calcium and an anion selected from among the group comprising carbonate, bicarbonate, borate, silicate, phosphate, percarbonate, and perphosphate, to form a dry mixture and compressing the mixture.The invention is further directed to tablets produced by this process. The invention is also directed to mixtures comprising N-halohydantoin, one-half to three percent by weight alkali metal or alkaline earth salt, minor components and less than about five percent water.