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Abstract

The present invention provides a preventive agent for fouling organisms, which comprises, as an effective ingredient, at least one compound selected from compounds represented by general formula (1) ##STR1## [wherein R.sup.1 is a lower alkyl group, or a phenyl group which may be substituted with a halogen atom(s) and/or a lower alkyl group(s); each X.sup.1 is a halogen atom; n is an integer of 1-5; when n is 2 or more, X.sup.1 s may be the same or different; and Y.sup.1 is a hydrogen atom or a group --Z--Y.sup.2 (Z is a carbonyl group or a sulfonyl group, and Y.sup.2 is a substituted or unsubstituted aryl group or a lower alkyl group], or salts thereof. The present preventive agent for fouling organisms, which contains a compound(s) other than organotin compounds as an effective ingredient, has high safety, prevents the settlement of fouling organisms to ships, in-water structures, fishing nets, etc. at a low effective ingredient content, and exhibits an antifouling effect stably over a long period of time.

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First Claim