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Acta Cryst. (2005). E61, o539-o540 [ doi:10.1107/S160053680500293X ]
Abstract: 3-Amino-4-methoxybenzenesulfonic acid exists in the solid state in the zwitterionic form as 3-ammonio-4-methoxybenzenesulfonate, C7H9NO4S. The zwitterions are linked by the ammonium H atoms into a layer structure.
Online 5 February 2005
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