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Melamine and poly vinylpyrrolidone(PVP) reacted with neat sulfuric acid readily to form two new organic solid acids namely melamine-(H_2SO_4)_3 and PVP-(H_2SO_4)_n.These solid acids were used for the first nitration of bisphenol A as well as other phenols in the presence of NH_4NO_3.Mono- and di-nitro bisphenol A have been characterized with IR and ~1H NMR techniques.