The nitration is performed using conc. HNO3-conc. H2SO4 mixt. (both acids 90-100 wt%) in wt. ratio 1:0.5 5, at an initial temp. of 0-20 deg C, with final temp. 10-30 deg C. The redn. may be carried out either by dissolving metals (Fe or Zn) or catalytically using ...