[NH:1]1[CH:5]=[CH:4][N:3]=[CH:2]1.[NH:6]1[C:13](=[O:14])[NH:12][C:10](=[O:11])[NH:9][C:7]1=[O:8]>>[NH:1]1[CH:5]=[CH:4][N:3]=[CH:2]1.[NH:6]1[C:13](=[O:14])[NH:12][C:10](=[O:11])[NH:9][C:7]1=[O:8]Heretofore, in a process for obtaining an adduct of imidazole-isocyanuric acid, water, aqueous solution of acetic acid, or dimethylformamide is used as a solvent. An imidazole compound and isocyanuric acid are charged into the solvent as it is in a solid to react by addition, and then crystallized while cooling, thereby being obtained an adduct of imidazole-isocyanuric acid. (confer JP-A-53-116391).
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