pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.2	IUPAC digitized pKa	0	-1	O=C/C(Cl)=C(/Cl)C(=O)O	O=C/C(Cl)=C(/Cl)C(=O)[O-]	mol9142	O=C/C(Cl)=C(/Cl)C(=O)O