1.0 2026-09-21 23:03:39 UTC 2026-09-21 23:03:39 UTC FDB117239 3-carboxy-1-methylpyridinium 1-methylpyridin-1-ium-3-carboxylic acid C7H8NO2 138.145 138.054954922 3-carboxy-1-methylpyridin-1-ium N-methylnicotinic acid C[N+]1=CC=CC(=C1)C(O)=O InChI=1S/C7H7NO2/c1-8-4-2-3-6(5-8)7(9)10/h2-5H,1H3/p+1 WWNNZCOKKKDOPX-UHFFFAOYSA-O belongs to the class of organic compounds known as pyridinecarboxylic acids. Pyridinecarboxylic acids are compounds containing a pyridine ring bearing a carboxylic acid group. Pyridinecarboxylic acids Organic compounds Organoheterocyclic compounds Pyridines and derivatives Pyridinecarboxylic acids and derivatives Aromatic heteromonocyclic compounds Azacyclic compounds Carboxylic acids Heteroaromatic compounds Hydrocarbon derivatives Monocarboxylic acids and derivatives N-methylpyridinium compounds Organic cations Organic oxides Organonitrogen compounds Organooxygen compounds Organopnictogen compounds Pyridinium derivatives Vinylogous amides Aromatic heteromonocyclic compound Azacycle Carboxylic acid Carboxylic acid derivative Heteroaromatic compound Hydrocarbon derivative Monocarboxylic acid or derivatives N-methylpyridinium Organic cation Organic nitrogen compound Organic oxide Organic oxygen compound Organonitrogen compound Organooxygen compound Organopnictogen compound Pyridine carboxylic acid Pyridinium Vinylogous amide pyridinium ion logp -3.19 ALOGPS logs -2.75 ALOGPS solubility 3.11e-01 g/l ALOGPS logp -3.5 ChemAxon pka_strongest_acidic 2.78 ChemAxon iupac 3-carboxy-1-methylpyridin-1-ium ChemAxon average_mass 138.145 ChemAxon mono_mass 138.054954922 ChemAxon smiles C[N+]1=CC=CC(=C1)C(O)=O ChemAxon formula C7H8NO2 ChemAxon inchi InChI=1S/C7H7NO2/c1-8-4-2-3-6(5-8)7(9)10/h2-5H,1H3/p+1 ChemAxon inchikey WWNNZCOKKKDOPX-UHFFFAOYSA-O ChemAxon polar_surface_area 41.18 ChemAxon refractivity 37.31 ChemAxon polarizability 13.86 ChemAxon rotatable_bond_count 1 ChemAxon acceptor_count 2 ChemAxon donor_count 1 ChemAxon physiological_charge 0 ChemAxon formal_charge 1 ChemAxon