Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Selenium trioxide is the inorganic compound with the formula SeO3. It is white, hygroscopic solid. It is also an oxidizing agent and a Lewis acid. It is of academic interest as a precursor to Se(VI) compounds.[4]
^
Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 4–81. ISBN 0-8493-0594-2.
^ ab"Selenium compounds (as Se)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
^"C&L Inventory". echa.europa.eu. Retrieved 16 December 2021.
^Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0123526515
Seleniumtrioxide is the inorganic compound with the formula SeO3. It is white, hygroscopic solid. It is also an oxidizing agent and a Lewis acid. It...
elemental selenium with nitric acid: 3 Se + 4 HNO3 + H2O → 3 H2SeO3 + 4 NO Unlike sulfur, which forms a stable trioxide, seleniumtrioxide is thermodynamically...
Sulfur trioxide (alternative spelling sulphur trioxide, also known as nisso sulfan) is the chemical compound with the formula SO3. It has been described...
forms two oxides: selenium dioxide (SeO2) and seleniumtrioxide (SeO3). Selenium dioxide is formed by the reaction of elemental selenium with oxygen: Se...
Selenium oxide may refer to either of the following compounds: Selenium dioxide, SeO2 Seleniumtrioxide, SeO3 Diselenium pentoxide, Se2O5 This set index...
similar to that of arsenic trioxide. The chronic toxic dose of selenite for humans is about 2400 to 3000 micrograms of selenium per day for a long time....
Selenium dioxide is the chemical compound with the formula SeO2. This colorless solid is one of the most frequently encountered compounds of selenium...
the production sulfuric acid by hydration of sulfur trioxide, the hydration of seleniumtrioxide is an impractical method. Instead, selenic acid may also...
dioxide, SO2 Sulfur trioxide, SO3 Higher sulfur oxides, SOx where x > 3 Selenium dioxide, SeO2 Seleniumtrioxide, SeO3 Mixtures of selenium and sulfur in different...
of selenic acid. Potassium selenate is produced by the reaction of seleniumtrioxide and potassium hydroxide. SeO3 + 2 KOH → K2SeO4 + H2O Alternatively...
of sulfur trioxide in SeOCl2 likely form [SeOCl]+[SO3Cl]− the same way. The compound hydrolyzes readily to form hydrogen chloride and selenium dioxide,[citation...
trioxide has been used in the production of natural gas, to boost the removal of carbon dioxide, as have selenous acid and tellurous acid. Selenium acts...
sulfur dioxide and sulfur trioxide. Tellurium also forms oxides. There are some chalcogen sulfides as well. These include selenium sulfide, an ingredient...
oxidises readily in air to form arsenic trioxide and water, and analogous reactions take place with sulfur and selenium instead of oxygen. Arsenic forms colorless...
toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found...
treated with sodium selenate and then arsenic trioxide to reduce the compound and provide elemental selenium. Sodium selenate is also used as a decolorizing...
oxidises readily in air to form arsenic trioxide and water, and analogous reactions take place with sulfur and selenium instead of oxygen. Arsenic forms colorless...
followed by: HOSO2· + O2 → HO2· + SO3 In the presence of water, sulfur trioxide (SO3) is converted rapidly to sulfuric acid: SO3 (g) + H2O (l) → H2SO4...
improves the rigidity of lead-alloy plates in lead–acid batteries. Antimony trioxide is a prominent additive for halogen-containing flame retardants. Antimony...
regarded as intermediate between metals and nonmetals: Carbon Phosphorus Selenium One or more of the six elements most commonly recognized as metalloids...
elevated temperatures (i.e., when red-hot) it reacts with oxygen to form the trioxide compound tungsten(VI), WO3. It will, however, react directly with fluorine...
Radon oxides are among the few other reported compounds of radon; only the trioxide (RnO 3) has been confirmed. The higher fluorides RnF 4 and RnF 6 have been...
easily oxidised to arsenic or antimony trioxide and water; a similar reaction happens with sulfur or selenium. Reaction with metals at elevated temperatures...
or by chemical processes such as spontaneous decomposition of hydrogen trioxide in water or the reaction of hydrogen peroxide with hypochlorite. Triatomic...
nitrogen oxide, ethylene, and hydrogen sulfide. It reacts with sulfur trioxide and peroxydisulfuryl difluoride (S2O6F2) to form salts of the iodyl cation...
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