Molecular properties
- Formula
- HNO2
- Molar mass
- 47.01 g·mol−1
- Exact mass
- 47.0007 Da
- 0
- PubChem CID
- 24529
Molecule record
nitrous acid
HNO2
47.01 g/mol
Loading structure
Functional groups
No functional-group assignment has been curated yet.
Physical properties
No source-backed physical properties are curated for this molecule yet.
Common names and synonyms
- (NO(OH))
- 231-963-7
- 7782-77-6
- Acid, Nitrous
- CHEBI:25567
- DTXCID4048014
- DTXSID7064813
- EINECS 231-963-7
Show all 24 synonyms
- HNO2
- HONO
- HSDB 7801
- Kyselina dusite
- Kyselina dusite [Czech]
- NITROUS ACID [MI]
- Nitrogen dioxide ion
- Nitrogen peroxide ion
- Nitrosyl hydroxide
- Nitrous acid, trans
- RefChem:6071
- T2I5UM75DN
- UNII-T2I5UM75DN
- dioxonitric acid
- hydrogen dioxonitrate(1-)
- hydroxidooxidonitrogen
Structure identifiers
- Canonical SMILES
- O=NO
- Isomeric SMILES
- N(=O)O
- InChI
- InChI=1S/HNO2/c2-1-3/h(H,2,3)
- InChIKey
- IOVCWXUNBOPUCH-UHFFFAOYSA-N
- PubChem CID
- 24529
Spectroscopy
Tabs appear only for spectra stored with clear provenance.
No redistributable or simulated spectroscopy record is attached yet.
Simulated NMR
On-demand educational prediction for nitrous acid; not experimental data.
Simulated EI mass spectrum
On-demand educational fragmentation for nitrous acid; not experimental data.
Sources
Molecule identity
Retrieved 8/20/2026. Reuse status is summarized by the badge; open the source for full details.