What is "dinitrobenzene"

n. (context organic compound English) Any of three isomeric aromatic nitro compounds C₆H₄(NO₂)₂ formed by the nitration of benzene; they are used in the manufacture of dyes etc

Dinitrobenzenes are chemical compounds composed of a benzene ring and two nitro group (-NO) substituents. The three possible arrangements of the nitro groups afford three isomers, 1,2-dinitrobenzene, 1,3-dinitrobenzene, and 1,4-dinitrobenzene. Each isomer has the chemical formula CHNO and a molar mass of about 168.11 g/mol. 1,3-Dinitrobenzene is the most common isomer and it is used in the manufacture of explosives.