How do you recrystalize 2-thiohydentoin? - Answers

To recrystallize 2-thiohydantoin, first dissolve the compound in a suitable hot solvent, such as ethanol or water, at elevated temperatures to ensure complete dissolution. Once the solution is saturated, allow it to cool slowly to room temperature and then further cool it in an ice bath to promote crystallization. Filter the resulting crystals, wash them with cold solvent to remove impurities, and dry them to obtain pure 2-thiohydantoin.