WebMETHOD OF TEST FOR ASSAY OF ORTHO-CHLORO PARA-NITRO ANILINE (OCPNA) A-1 PRINCIPLE A known mass of the sample is dissolved in concentrated sulphuric acid, re-precipitated in finely divided form by dilution and titrated against standard sodium nitrite solution in presence of hydrochloric acid. http://myweb.liu.edu/~nmatsuna/che122/exp14.pdf
Nitration of aniline - Chemistry Stack Exchange
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