过氧化丁酮（MEKP），别名过氧化甲乙酮。

无色有宜人气味透明油状液体。室温下稳定，加热至100°C时即发生爆炸。吸入蒸气对粘膜有刺激作用，并在血中出现高铁血红素。人类口服后迅速发生呕血、虚脱，长时间可致胃出血甚至死亡。

Methyl ethyl ketone peroxide (MEKP) is an organic peroxide, a high explosive similar to acetone peroxide. MEKP is a colorless, oily liquid whereas acetone peroxide is a white powder at STP; MEKP is slightly less sensitive to shock and temperature, and more stable in storage. Depending on the experimental conditions, several different adducts of methyl ethyl ketone and hydrogen peroxide are known. The first to be reported was a cyclic dimer, C₈H₁₆O₄, in 1906. Later studies found that a linear dimer is the most prevalent in the mixture of products typically obtained, and this is the form that is typically quoted in the commercially available material from chemical supply companies.