Sodium nitrite
An inorganic sodium salt having nitrite as the counterion. Used as a food preservative and antidote to cyanide poisoning. — ChEBI
Safety documents & references
1 indexed referencesFind a product-specific SDS
Safety guides and government classification records are not a manufacturer’s SDS. Match supplier, product number, concentration, physical form, region and revision before using a document.
Identity & molecular properties
Source-linked values| CAS number | 7632-00-0 | ChEBI ↗ |
| Molecular formula | NO2.Na | ChEBI ↗ |
| Molar mass | 68.995 g/mol | ChEBI ↗ |
| Monoisotopic mass | 68.98267 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:78870 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 68.995 g/mol | PubChem ↗ |
| Exact mass | 68.98267252 Da | PubChem ↗ |
PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.
Names & structural identifiers
Copy any identifiersodium nitritesodium nitriteLPXPTNMVRIOKMN-UHFFFAOYSA-MO=N[O-].[Na+]InChI=1S/HNO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.
Safety classification · Japan
NITE / Japanese governmentSodium nitrite · 23B5576
| Endpoint | Reported classification |
|---|---|
| Oxidizing solids | Category 3 |
| Acute toxicity （Oral） | Category 3 |
| Serious eye damage/eye irritation | Category 2A |
| Germ cell mutagenicity | Category 2 |
| Reproductive toxicity | Category 2, Additional category: Effects on or via lactation |
| Specific target organ toxicity - Single exposure | Category 1 (blood) |
Selected source-reported endpoints. Other endpoints, rationales and conditions remain in the original classification. Missing or unlisted information does not mean non-hazardous. This is not a global classification or transport decision.
Read the original NITE classificationMass ↔ amount of substance
Calculated from sourced massUses 68.995 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsONaNCalculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.
Research & patent references
Selected source associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.