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CAS 10102-18-8

CAS 10102-18-8 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 10102-18-8
CAS 10102-18-8PubChem CID 24934

Sodium Selenite

Disodium selenite is an inorganic sodium salt composed of sodium and selenite ions in a 2:1 ratio. It has a role as a nutraceutical. It is an inorganic sodium salt and a selenite salt. — ChEBI

IUPAC name
disodium;selenite
Molecular formula
Na2O3Se
Molecular weight
172.95 g/mol
Exact mass
173.88080 Da
Topological polar surface area
63.2 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
3
Covalent units
3
Defined stereocentres
0

Also known as

Disodium seleniteNatriumselenitSelenious acid, disodium saltSelenious Acid Disodium SaltDisodium selenium trioxideSelenite sodiumPleo seleneSelenious acid, sodium salt (1:2)
16 more reported names
Sodium selenite anhydrousHIW548RQ3WH2-O3-Se.1/2NaSelenious acid (H2SeO3), disodium saltNSC-347466CHEBI:48843Selenite, SodiumBiselenite, SodiumSelenite, DisodiumSelenite, MonosodiumRefChem:6247Selenous Acid Disodium SaltSelenite pentahydrate, SodiumPentahydrate, Sodium SeleniteSelenous Acid, Disodium Salt233-267-9
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Evidence from additional scientific databases

EMBL-EBI ChEBI
Exact identifier matchCHEBI:48843

disodium selenite

An inorganic sodium salt composed of sodium and selenite ions in a 2:1 ratio.

Formula
2Na.O3Se
Average mass
172.937 g/mol
Monoisotopic mass
173.88080 Da
Formal charge
0
  • selenite salt — is a (CHEBI:48840)
  • inorganic sodium salt — is a (CHEBI:38702)
  • nutraceutical — has role (CHEBI:50733)
  • antineoplastic agent — has role (CHEBI:35610)
  • cardiovascular drug — has role (CHEBI:35554)
  • nutraceutical — has role (CHEBI:50733)
  • antineoplastic agent — has role (CHEBI:35610)
  • cardiovascular drug — has role (CHEBI:35554)
  • selenite salt — is a (CHEBI:48840)
  • inorganic sodium salt — is a (CHEBI:38702)
Additional curated names
disodium selenitedisodium selenium trioxideNa2SeO3NatriumselenitNSC-347466selenious acid disodium saltselenious acid, disodium saltselenious acid (H2SeO3) disodium saltselenious acid, sodium salt (1:2)sodium seleniteSodium selenite anhydrousSodium selenite se-75Sodium selenite (selenium-75)
Cross-references from this source

Mapped by: Exact CAS cross-reference in the ChEBI compound record. Source updated: 2024-05-17. Retrieved: 2026-08-31. Open source record

NIH PubChem PUG-View
Exact identifier match24934

Attributed physical-property, hazard, environmental and use annotations.

  • Vapor Pressure: less than 0.001 mmHg at 68 °F (NTP, 1992) Source: CAMEO Chemicals
  • First Aid: Signs and Symptoms of Sodium Selenite Exposure: Signs and symptoms of acute sodium selenite exposure include the following: garlic odor on breath, drooling, nasal irritation and burning sensation in nostrils, vomiting, hypotension, dizziness, and poor reflexes. Pulmonary edema, cardiopulmonary arrest, and coma are possible complications. Contact with sodium selenite often results in skin irritation and burns.; Emergency Life-Support Procedures: Acute exposure to sodium selenite may require decontamination and life support for the victims. Emergency personnel should wear protective clothing appropriate to the type and degree of contamination. Air-purifying or supplied-air respiratory equipment should also be worn, as necessary. Rescue vehicles should carry supplies such as plastic sheeting and disposable plastic bags to assist in preventing spread of contamination.; Inhalation Exposure:; 1. Move victims to fresh air. Emergency personnel should avoid self-exposure to sodium selenite.; 2. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, admini Source: CAMEO Chemicals
  • Signal: Danger Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • GHS Hazard Statements: H300: Fatal if swallowed [Danger Acute toxicity, oral]; H317: May cause an allergic skin reaction [Warning Sensitization, Skin]; H331: Toxic if inhaled [Danger Acute toxicity, inhalation]; H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • Precautionary Statement Codes: P261, P264, P270, P271, P272, P273, P280, P301+P316, P302+P352, P304+P340, P316, P321, P330, P333+P317, P362+P364, P391, P403+P233, P405, and P501 (click each P-code to see the statement) Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • Signal: Danger Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H300+H330 (11%): Fatal if swallowed or if inhaled [Danger Acute toxicity, oral; acute toxicity, inhalation]; H300 (100%): Fatal if swallowed [Danger Acute toxicity, oral]; H315 (28.4%): Causes skin irritation [Warning Skin corrosion/irritation]; H317 (92.9%): May cause an allergic skin reaction [Warning Sensitization, Skin]; H319 (28%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H330 (28%): Fatal if inhaled [Danger Acute toxicity, inhalation]; H331 (71.6%): Toxic if inhaled [Danger Acute toxicity, inhalation]; H400 (29.7%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H410 (28.6%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]; H411 (75.5%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
  • Precautionary Statement Codes: P260, P261, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P302+P352, P304+P340, P305+P351+P338, P316, P320, P321, P330, P332+P317, P333+P317, P337+P317, P362+P364, P391, P403+P233, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
  • ECHA C&L Notifications Summary: Aggregated GHS information provided per 518 reports by companies from 13 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
  • Signal: Danger Source: NITE-CMC
  • GHS Hazard Statements: H300: Fatal if swallowed [Danger Acute toxicity, oral]; H315: Causes skin irritation [Warning Skin corrosion/irritation]; H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H341: Suspected of causing genetic defects [Warning Germ cell mutagenicity]; H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]; H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]; H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]; H401: Toxic to aquatic life [Hazardous to the aquatic environment, acute hazard]; H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard] Source: NITE-CMC
  • Precautionary Statement Codes: P203, P260, P264, P264+P265, P270, P273, P280, P301+P316, P302+P352, P305+P351+P338, P308+P316, P318, P319, P321, P330, P332+P317, P337+P317, P362+P364, P391, P405, and P501 (click each P-code to see the statement) Source: NITE-CMC
  • Signal: Warning Source: NITE-CMC
  • GHS Hazard Statements: H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard] Source: NITE-CMC
  • Health Effects: Chronic oral exposure to high concentrations of selenium compounds can produce a disease called selenosis. The major signs of selenosis are hair loss, nail brittleness, and neurological abnormalities (such as numbness and other odd sensations in the extremities). Animal studies have shown that selenium may also affect sperm production and the female reproductive cycle. (L619) Source: Toxin and Toxin Target Database (T3DB)
  • Toxicity Summary: Selenium readily substitutes for sulfur in biomolecules and in many biochemical reactions, especially when the concentration of selenium is high and the concentration of sulfur is low. Inactivation of the sulfhydryl enzymes necessary for oxidative reactions in cellular respiration, through effects on mitochondrial and microsomal electron transport, might contribute to acute selenium toxicity. Selenomethionine (a common organic selenium compound) also appears to randomly substitute for methionine in protein synthesis. This substitution may affect the structure and functionability of the protein, for example, by altering disulfide bridges. Inorganic forms of selenium appear to react with tissue thiols by redox catalysis, resulting in formation of reactive oxygen species and causing damage by oxidative stress. (L619) Source: Toxin and Toxin Target Database (T3DB)
  • Environmental Bioconcentration: The BCF values observed for selenium selenite in carp (Cyprinus carpio) after 28 days exposure at 10 and 1 ug/L concentrations were <8.1-10 and <85, respectively(1). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: TERRESTRIAL FATE: Selenite (Se(IV)) is soluble, but can strongly adsorb to soil minerals and organic material(1). In soils, inorganic selenium compounds can be methylated by microorganisms and subsequently volatilize to the atmosphere(2,3); dimethylselenide and dimethyl diselenide are the principal products(3). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: AQUATIC FATE: In aqueous solution, over the pH range of 3 to 9, the biselenite species predominates; at pHs >9, selenite is the major species(1). Source: Hazardous Substances Data Bank (HSDB)

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status
SourceResultChecked
EMBL-EBI ChEBIExact match2026-08-31
NIH PubChem PUG-ViewExact match2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

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

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CAS 10102-18-8 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.

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