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Bismuth(III) nitrate (Bi(NO 3 ) 3 ) has pharmaceutical applications and is usually produced from elemental bismuth dissolution in nitric acid (HNO 3 ). However, if bismuthinite (Bi 2 S 3 ), which is one of the main minerals of bismuth, is used to produce elemental bismuth, sulfur dioxide (SO 2 ), carbon monoxide (CO), and nitrogen oxides (NO x ) are produced, which are three of the air pollutants considered the most serious threats to human health and welfare. This communication takes a thermodynamic approach to examine and then suggests an environmentally friendlier procedure to produce Bi(NO 3 ) 3 : the direct dissolution of Bi 2 S 3  in 1 M HNO 3  at room temperature (25 °C).

Room-temperature wet synthesis of bismuth(III) nitrate from bismuthinite: a thermodynamics-based communication