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CAS 7782-77-6

CAS 7782-77-6 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7782-77-6

CAS 7782-77-6PubChem CID 24529

Nitrous Acid

Nitrous acid is a nitrogen oxoacid. It is a conjugate acid of a nitrite. — ChEBI

IUPAC name: nitrous acid

Molecular formula: HNO2
Molecular weight: 47.014 g/mol
Exact mass: 47.000728275 Da
XLogP3: -0.3
Topological polar surface area: 49.7 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 3
Covalent units: 1
Defined stereocentres: 0

Also known as

Nitrosyl hydroxideHNO2Kyselina dusitedioxonitric acidhydroxidooxidonitrogenAcid, NitrousT2I5UM75DNhydrogen dioxonitrate(1-)

16 more reported names

CHEBI:25567(NO(OH))[NO(OH)]RefChem:6071231-963-7HONOKyselina dusite [Czech]EINECS 231-963-7UNII-T2I5UM75DNHSDB 7801Nitrogen dioxide ionNitrous acid, transNitrogen peroxide ionNITROUS ACID [MI]SCHEMBL1057SCHEMBL9214

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External database identifiers

ChEBI:CHEBI:25567
ChEMBL:CHEMBL1161681
EPA DTXSID:DTXSID7064813
PubMed:25803049
PubMed:25421879
PubMed:18167491
PubMed:10320667
PubMed:10024740
PubMed:1569239

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7782-77-6

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CAS 7782-77-6 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 7782-77-6 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.