# Selenium Tetrabromide **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/selenium-tetrabromide **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-04-04 **Evidence Score:** 2 / 10 **Category:** Mineral **Also Known As:** SeBr₄, selenium(IV) bromide, selenium bromide, selenium tetrabromide crystals, tetrabromoselane ## Overview Selenium tetrabromide (SeBr4) is an inorganic selenium halide compound with no documented therapeutic or nutritional applications. Unlike bioavailable selenium forms such as selenomethionine or sodium selenite, SeBr4 is classified as an acutely toxic industrial chemical with no evidence of safe human use. ## Health Benefits • No documented health benefits - highly toxic compound (H301, H311, H331) • No clinical trials or biomedical applications found in literature • Causes severe skin burns and eye damage (H314) • Suspected carcinogen (H351) with specific target organ toxicity • No evidence of therapeutic use due to extreme reactivity and toxicity ## Mechanism of Action Selenium tetrabromide hydrolyzes readily in aqueous environments to release hydrobromic acid (HBr) and selenium dioxide (SeO2), both of which are cytotoxic to biological tissues. The released SeO2 can oxidize thiol groups in proteins and disrupt [glutathione](/ingredients/condition/detox) peroxidase function, causing oxidative cellular damage rather than the [antioxidant](/ingredients/condition/antioxidant) benefit associated with organic selenium species. Concurrent bromide ion release contributes to cellular toxicity by disrupting ionic homeostasis and halogenating biomolecules. ## Clinical Summary No clinical trials, human studies, or controlled animal studies evaluating therapeutic use of selenium tetrabromide exist in the published biomedical literature as of 2024. The compound appears exclusively in industrial chemistry and toxicology contexts, with no PubMed-indexed trials or case reports of intentional therapeutic administration. Its GHS hazard classifications (H301, H311, H331, H314, H351) indicate acute oral, dermal, and inhalation toxicity as well as suspected carcinogenicity, making clinical investigation ethically unjustifiable. Evidence strength for any health application is rated as absent. ## Nutritional Profile Selenium Tetrabromide (SeBr4) is an inorganic halide compound with a molecular weight of 398.58 g/mol, consisting of approximately 19.8% selenium by mass and 80.2% bromine by mass. It is not a food ingredient, nutrient, or dietary supplement and has zero nutritional value. As a purely synthetic inorganic compound, it contains no macronutrients (zero protein, zero carbohydrates, zero fats, zero fiber), no vitamins, and no beneficial bioactive compounds. While selenium as an element is an essential micronutrient required by humans at trace levels (RDA: 55 mcg/day for adults), the selenium in SeBr4 is bound in a highly reactive, acutely toxic oxidation state (+4) that confers no nutritional bioavailability whatsoever. Bromine content similarly offers no nutritional benefit. The compound is highly reactive with moisture, hydrolyzing to form hydrobromic acid (HBr) and selenium oxybromide species, making any concept of 'bioavailability' relevant only in the context of toxic exposure pathways. No caloric value, no essential fatty acids, no [antioxidant](/ingredients/condition/antioxidant) capacity, and no fiber content are present. This compound exists solely as an industrial/laboratory chemical and must not be considered in any nutritional context. ## Dosage & Preparation No clinically studied dosages exist as selenium tetrabromide has no biomedical applications. Occupational exposure limits are set at TWA 0.2 mg/m³ (ACGIH, NIOSH) for industrial settings only. This compound should never be used as a supplement. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Selenium tetrabromide is acutely toxic via oral ingestion, skin contact, and inhalation, with LD50 values in animal models consistent with severe systemic toxicity at low doses. It causes irreversible skin burns and serious eye damage (H314) due to rapid hydrolysis producing corrosive HBr and SeO2. The compound is a suspected carcinogen (H351) and carries specific target organ toxicity warnings for repeated exposure. It is absolutely contraindicated for human consumption, has no established safe dosage, and poses extreme risk during pregnancy and for all other populations. ## Scientific Research No human clinical trials, randomized controlled trials, or meta-analyses exist for selenium tetrabromide. PubMed searches yield no PMIDs for biomedical studies, as this compound has never been investigated for therapeutic purposes due to its inherent toxicity and chemical instability. ## Historical & Cultural Context Selenium tetrabromide has no historical use in any traditional medicine systems including Ayurveda or Traditional Chinese Medicine. As a synthetic compound with no stability in biological systems, it has never been employed for medicinal purposes. ## Synergistic Combinations None - this compound should not be combined with any supplements ## Frequently Asked Questions ### Can selenium tetrabromide be used as a selenium supplement? No. Selenium tetrabromide (SeBr4) is an industrial inorganic halide compound classified as acutely toxic and corrosive. Safe supplemental selenium sources include selenomethionine (55–200 mcg/day) or sodium selenite, neither of which shares any chemical or safety properties with SeBr4. ### Is selenium tetrabromide the same as dietary selenium? No. Dietary selenium refers to bioavailable organic forms such as selenomethionine and selenocysteine, or pharmaceutical-grade inorganic forms like sodium selenite. Selenium tetrabromide is a reactive halide salt that hydrolyzes to produce corrosive byproducts (HBr and SeO2) and has no nutritional equivalence to dietary selenium compounds. ### Why is selenium tetrabromide considered dangerous? Selenium tetrabromide carries GHS hazard codes H301 (toxic if swallowed), H311 (toxic in contact with skin), H331 (toxic if inhaled), H314 (causes severe skin burns and eye damage), and H351 (suspected carcinogen). Its rapid hydrolysis in moisture produces hydrobromic acid and selenium dioxide, both of which are highly destructive to biological tissues. ### Has selenium tetrabromide been studied for any medical use? As of 2024, no peer-reviewed clinical trials or formal biomedical investigations of selenium tetrabromide for therapeutic purposes exist in indexed databases such as PubMed or ClinicalTrials.gov. The compound's extreme toxicity profile has precluded any research into medicinal applications, and it is used exclusively in inorganic synthesis and materials chemistry. ### What should I do if I am accidentally exposed to selenium tetrabromide? Accidental exposure to selenium tetrabromide requires immediate emergency response: flush affected skin or eyes with large amounts of water for at least 15–20 minutes and seek immediate medical attention. Inhalation exposure requires removal to fresh air and urgent clinical evaluation for respiratory tract damage. Contact Poison Control (1-800-222-1222 in the US) or local emergency services immediately. ### Why is selenium tetrabromide sometimes mentioned in chemistry or industrial contexts rather than supplement discussions? Selenium tetrabromide is a chemical reagent used in laboratory and industrial applications, not a supplement ingredient, which is why it appears in chemistry literature rather than nutritional research. Its highly reactive nature and extreme toxicity make it unsuitable for any ingestion or human health application. It should never be confused with legitimate selenium supplement forms like selenomethionine or sodium selenite, which are specifically designed for safe dietary use. ### What regulatory status does selenium tetrabromide have in supplement or food regulations? Selenium tetrabromide is not approved or permitted for use in dietary supplements, food products, or any human consumption applications by regulatory agencies including the FDA, EFSA, or other international bodies. It is classified and regulated exclusively as a hazardous industrial chemical due to its confirmed toxic and corrosive properties. Any supplement product claiming to contain selenium tetrabromide would be illegal and extremely dangerous. ### How does selenium tetrabromide differ chemically from safe forms of selenium used in supplements? Selenium tetrabromide is an inorganic brominated compound with extreme reactivity and toxicity, whereas safe supplement forms like selenomethionine (organic) or sodium selenate (stabilized inorganic) are specifically formulated for bioavailability and safety. The bromide component in selenium tetrabromide adds significant hazard beyond selenium's natural toxicity at high doses. This fundamental chemical difference makes selenium tetrabromide completely unsuitable for any nutritional or therapeutic purpose. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*