is conjugate acid of nitrite nitrous acid 0 47.001 47.01348 CAS:7782-77-6 CHEBI:25567 Gmelin:983 HNO2 IOVCWXUNBOPUCH-UHFFFAOYSA-N InChI=1S/HNO2/c2-1-3/h(H,2,3) KEGG:C00088 PDBeChem:NO2 [H]ON=O [NO(OH)] chebi_ontology dioxonitric acid hydrogen dioxonitrate(1-) hydroxidooxidonitrogen nitrosyl hydroxide nitrous acid nitrogen oxoacid