1. Much attention has been shown to Para - nitroaniline ( pNA ) for its strong nonlinear optical response.

2. Synthesis of o phenylenediamine from o nitroaniline by catalytic hydrogenation at lower pressure was studied.

3. Health standard for p- nitroaniline in the air of workplace.

4. Fig. 2 Electrophorogram ofm , o , p nitroaniline of 3 transition metal ions as coordination center.

5. Nitroaniline derivatives have been synthesized and there are 4 compounds having chiral atom in them.

6. The effect of ionic strength and the coexisting organic compounds on adsorption ofp - nitroaniline were also investigated.

7. The solvent effects on the nonlinear optical properties of para- nitroaniline (pNA) molecule are studied on the base of time dependent density functional theory.

8. The methods were used to resolve overlapping spectra of the mixtures ofp-nitrotoluene, p-nitrophenol and p- nitroaniline .