1.0 2026-04-06 04:25:35 UTC 2026-05-20 17:24:05 UTC Calcium 4-[2-(4-methyl-2-sulfonatophenyl)hydrazinylidene]-3-oxo-3,4-dihydronaphthalene-2-carboxylate SmallMolecule Calcium 4-[2-(4-methyl-2-sulfonatophenyl)hydrazinylidene]-3-oxo-3,4-dihydronaphthalene-2-carboxylate is an organic compound with the chemical formula $\text{C}_{18}\text{H}_{12}\text{N}_2\text{O}_6\text{S}$ and an average molecular weight of 424.44 g/mol. Calcium 4-[2-(4-methyl-2-sulfonatophenyl)hydrazinylidene]-3-oxo-3,4-dihydronaphthalene-2-carboxylate belongs to the naphthalenecarboxylic acids and derivatives, a subclass of naphthalenes within the organic compounds. This substance has been identified in or released from 19 recorded sources across several sectors. Within aquatic systems and sediments, it is found in groundwater, surface water, seawater, and freshwater. In the context of drinking water and water supply, it has been detected in drinking water, tap water, bottled water, and desalinated water. It is also present in wastewater, sanitation, and biosolids, specifically within industrial wastewater, mine wastewater, unspecified wastewater, and wastewater treatment effluent. Additionally, the compound is associated with appliances, HVAC, and refrigerants, such as water heaters and water coolers. In the marine, shipping, and aquaculture sector, it is found in bilge water and ballast water, while in agriculture and land management, it appears in irrigation water. Two further sectors have also been recorded as sources. Human exposure to this compound may occur through oral, inhalation, and touch routes. PMT C18H12N2O6S 424.44 384.0416071 [Ca++].CC1=CC(=C(NN=C2C(=O)C(=CC3=CC=CC=C23)C([O-])=O)C=C1)S([O-])(=O)=O InChI=1S/C18H14N2O6S.Ca/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;/h2-9,19H,1H3,(H,22,23)(H,24,25,26);/q;+2/p-2 WANIKCLUTOABTP-UHFFFAOYSA-L Detected and Not Quantified average_mass 424.44 ChemAxon mono_mass 384.0416071 ChemAxon smiles [Ca++].CC1=CC(=C(NN=C2C(=O)C(=CC3=CC=CC=C23)C([O-])=O)C=C1)S([O-])(=O)=O ChemAxon formula C18H12N2O6S ChemAxon inchi InChI=1S/C18H14N2O6S.Ca/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;/h2-9,19H,1H3,(H,22,23)(H,24,25,26);/q;+2/p-2 ChemAxon inchikey WANIKCLUTOABTP-UHFFFAOYSA-L ChemAxon #<HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f3bf35d9f68>