[C:1]1([N:7]2[C:11](=[O:12])[NH:10][NH:9][C:8]2=[O:13])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[OH-].[Na+].[Cl:16][C:17]([Cl:21])([Cl:20])[S:18]Cl>O>[C:1]1([N:7]2[C:8](=[O:13])[N:9]([S:18][C:17]([Cl:21])([Cl:20])[Cl:16])[N:10]([S:18][C:17]([Cl:21])([Cl:20])[Cl:16])[C:11]2=[O:12])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1To a solution of 35.4g (0.2 mole) 4-phenyl urazole in 200 ml water was added a solution of 16g (0.4 mole) sodium hydroxide in 20 ml water. A mixture of 74.4g (0.4 mole)trichloromethylsulfenyl chloride and 3g of an emulsifier solution (EXEM 25, consisting of a mixture of alkyl benzene sulfonate and ethoxylated vegetable oil) in 50 ml water was added dropwise to the above basic solution while keeping the reaction mixture at 0° C. The reactants were mixed so that the reaction mixture was kept at a pH greater than 7. The precipitate that formed was filtered and the filter cake was washed with water. After drying and recrystallizing from benzene there was obtained 4-phenyl-1,2-bis-(trichloromethylthio)urazole having a melting point of 175° C.
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