2,4,6-Trinitrobenzoic acid
2,4,6-Trinitrobenzoic acid (TNBA) is an organic compound with the formula (O2N)3C6H2CO2H. It is a high explosive nitrated derivative of benzoic acid. Preparation and reactions
2,4,6-Trinitrobenzoic acid is prepared by oxidation of 2,4,6-trinitrotoluene (TNT). It is formed by oxidation of TNT and nitric acid with chlorate and with dichromate. Upon heating, 2,4,6-trinitrobenzoic acid undergoes decarboxylation to give 1,3,5-trinitrobenzene. Reduction with tin gives 2,4,6-triaminobenzenoic acid, a precursor to phloroglucinol (1,3,5-trihydroxybenzene). References 

Explosive chemicals
Benzoic acids