Nippoh Chemicals Co., Ltd.

Nippon Chemicals Co., Ltd.

Kazuhisa Inoue

Yukihiko Hanamura

Takaaki Miyazawa

Tomohiro Ikegami

A method for producing a halohydantoin compound according to the present invention includes the steps of: (a) providing, in a dryer, a composition containing (i) at least one component selected from the group consisting of water, an organic solvent, and elemental halogen and (ii) a halohydantoin compound; and (b) drying the composition under reduced pressure in the dryer, the reduced pressure being reduced to a pressure lower than atmospheric pressure while introducing an inert gas from an outside source into the dryer.

Method for producing halohydantoin compound and halohydantoin compound

The present invention provides a means which can inhibit release of Iin production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I. The present invention provides a production method for 1,3-diiodohydantoin compound comprising a step to prepare a wet body containing a 1,3-diiodohydantoin compound, and (1) a step to dry the wet body by contacting the wet body with heated gas or (2) a step to lyophilize the wet body, a storage method for 1,3-diiodohydantoin compound comprising a step to store a 1,3-diiodohydantoin compound under a temperature condition of 15&#xb0; C. or lower, and a 1,3-diiodohydantoin compound wherein content of released Iis 1% by mass or less.

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Isumi, Japan

Kazuhisa Inoue