Henry John Horstman Fenton,who lived between (1854 – 1929) was a British chemist, who invented Fenton's reagent in the 1890s,a solution of hydrogen peroxide and an iron catalyst that is used to oxidize contaminants or waste waters. Fenton's reagent can be used to destroy organic compounds such as trichloroethylene (TCE) and tetrachloroethylene (PCE).
Born in London, Henry Fenton was educated at Magdalen College School, King's College London and Christ's College, Cambridge.He became the university demonstrator in Chemistry at Cambridge in 1878, and was University Lecturer in Chemistry from 1904 to 1924.