You can easily remove peroxide impurities in water-insoluble solvents (ether, hydrocarbons) by shaking with the following solution:

  • 60 g of ferrous sulfate
  • 6 mL of concentrated sulfuric acid
  • 110 mL of distilled water

Water is introduced by this method. Therefore, post-drying is required if you need a dry solvent. If you want to treat more than 500 mL of solvent, an additional batch of peroxide-removal solution might be necessary. Test all solvents for peroxides after these procedures, to ensure adequate removal has occurred.