Form I crystals of 3- (3,5-dichloro-4-hydroxybenzoyl) -1,1-dioxo-2,3-dihydro-1,3-benzothiazole, 3- (3,5-dichloro Form II crystals of 4-hydroxybenzoyl) -1,1-dioxo-2,3-dihydro-1,3-benzothiazole, 3- (3,5-dichloro-4-hydroxybenzoyl)- A pharmaceutical composition comprising a hydrate of 1,1-dioxo-2,3-dihydro-1,3-benzothiazole, salts thereof, and a pharmaceutically acceptable carrier, and a method for producing the same.3-(3,5-디클로로-4-히드록시벤조일)-1,1-디옥소-2,3-디히드로-1,3-벤조티아졸의 I형 결정, 3-(3,5-디클로로-4-히드록시벤조일)-1,1-디옥소-2,3-디히드로-1,3-벤조티아졸의 II형 결정, 3-(3,5-디클로로-4-히드록시벤조일)-1,1-디옥소-2,3-디히드로-1,3-벤조티아졸의 수화물, 이들의 염 및 약학적으로 허용되는 담체를 함유하는 의약 조성물과 그 제조 방법.