Using Redox Titration for the Determination of Hydrogen Peroxide in Sanitizers Hydrogen peroxide (H 2O 2) is a chemical compound with strong oxidizing capabilities, which acts against a variety of microorganisms, including bacteria, viruses, fungi, yeasts and spores 1,2. It has been utilized in several formulations of bleaching agents, disinfectants and sanitizers. The concentration of H 1. While a concentration of 3% H 2O 2O 2. 2O 3. For this application, H 2O 2 content is established with redox titration methods utilizing cerium (IV) sulfate as a titrant and DMi140-SC electrode. Sample preparation and procedures 4) 4) Add 10 mL 98% H 2SO 4, stir the solution while heating it to ~50 °C. Wait until cerium sulfate is dissolved completely.