pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
0.54	IUPAC digitized pKa	0	-1	CSC(=O)C(=O)O	CSC(=O)C(=O)[O-]	mol9021	CSC(=O)C(=O)O
0.540000021457672	QSARToolbox	0	-1	CSC(=O)C(=O)O	CSC(=O)C(=O)[O-]	mol9021	CSC(=O)C(=O)O