Catalyzes the oxidative denitrification of neutral nitroalkanes, including 3-nitro-2-pentanol, 1-nitropropane, 2-nitropropane, nitroethane and nitrocyclohexane, and may thereby protect the organism against toxic compounds. Has no detectable acyl-CoA dehydrogenase activity. a primary nitroalkane + H2O + O2 = an aldehyde + H(+) + H2O2 + nitrite a secondary nitroalkane + H2O + O2 = a ketone + H(+) + H2O2 + nitrite Strongly inhibited by mercury chloride and KCN. Optimum pH is 8.0. Optimum temperature is 40 degrees Celsius. Homotetramer. Up-regulated by nitroethane. Belongs to the acyl-CoA dehydrogenase family.