2,4-二硝基苯酚（2,4-DNP或简称DNP）是具有式HOC 6 H 3（NO 2）2的有机化合物。它是黄色的结晶固体，具有甜味，霉味气味。它升华，用蒸汽挥发，并且溶于大多数有机溶剂以及碱性水溶液。它是其他化学品的前体，并且是生物化学活性的，抑制具有线粒体的细胞中的能量（腺苷三磷酸，ATP）产生。其在高剂量下作为节食助剂的使用已经被鉴定为具有严重的副作用，包括多种死亡。

2,4-Dinitrophenol (2,4-DNP or simply DNP) is an organic compound with the formula HOC6H3(NO2)2. It is a yellow, crystalline solid that has a sweet, musty odor. It sublimes, is volatile with steam, and is soluble in most organic solvents as well as aqueous alkaline solutions. It is a precursor to other chemicals and is biochemically active, inhibiting energy (adenosine triphosphate, ATP) production in cells with mitochondria. Its use in high doses as a dieting aid has been identified with severe side-effects, including a number of deaths.