2,4-Dinitrophenol (2,4-DNP, 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 (ATP) production in cells with mitochondria. DNP is considered an important environmental contaminant by the United States Environmental Protection Agency.
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