Disodium selenite
An inorganic sodium salt composed of sodium and selenite ions in a 2:1 ratio. — ChEBI
Safety documents & references
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Identity & molecular properties
Source-linked values| CAS number | 10102-18-8 | ChEBI ↗ |
| Molecular formula | 2Na.O3Se | ChEBI ↗ |
| Molar mass | 172.937 g/mol | ChEBI ↗ |
| Monoisotopic mass | 173.8808 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:48843 | ChEBI ↗ |
Names & structural identifiers
Copy any identifierdisodium selenitedisodium seleniteBVTBRVFYZUCAKH-UHFFFAOYSA-LO=[Se]([O-])[O-].[Na+].[Na+]InChI=1S/2Na.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2Classification & 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 selenite · H29-B-104
| Endpoint | Reported classification |
|---|---|
| Acute toxicity （Oral） | Category 2 |
| Skin corrosion/irritation | Category 2 |
| Serious eye damage/eye irritation | Category 2 |
| Germ cell mutagenicity | Category 2 |
| Reproductive toxicity | Category 2 |
| Specific target organ toxicity - Single exposure | Category 1 (central nervous system, respiratory organs, heart, liver, kidney, gastrointestinal tract) |
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 172.937 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
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
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