The mutual solubilities and liquid–liquid equilibria of nitromethane ternary and quaternary systems with liquid solvents are reviewed. The solvents include water, inorganic compounds, and a variety of organic compounds such as hydrocarbons, halogenated hydrocarbons, alcohols, acids, esters, and nitrogen compounds. A total of 107 ternary and eight quaternary systems whose properties were described in the chemical literature through 1998 are compiled. For 22 systems, sufficient data were available to allow critical evaluation. All data are expressed as mass and mole fractions as well as the originally reported units. Similar reviews of gas, liquid, and solid solubilities for other systems have been published in the frame of Solubility Data Series. This is the 72 volume of this series. © 2001 American Institute of Physics.