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Compound with three oxygen atoms
structure. Carbon trioxide, CO3 Chromium trioxide, CrO3 Molybdenum trioxide, MoO3 Rhenium trioxide, ReO3 Selenium trioxide, SeO3 Sulfur trioxide, SO3 Tellurium
Trioxide
Chemical compound
Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO3. It has been described as "unquestionably the most
Sulfur_trioxide
Industrial chemical and medication
Arsenic trioxide is the inorganic compound with the formula As4O6. As an industrial chemical, its major uses include the manufacture of wood preservatives
Arsenic_trioxide
Chemical compound
Chromium trioxide (also known as chromium(VI) oxide or chromic anhydride) is the inorganic compound with the formula CrO3. It is the acidic anhydride of
Chromium_trioxide
Chemical compound
Xenon trioxide is an unstable compound of xenon in its +6 oxidation state. It is a very powerful oxidizing agent, and liberates oxygen from water slowly
Xenon_trioxide
Chemical compound
Dinitrogen trioxide (also known as nitrous anhydride) is the inorganic compound with the formula N2O3. It is a nitrogen oxide. It forms upon mixing equal
Dinitrogen_trioxide
Chemical compound
Carbon trioxide (CO3) is an unstable oxide of carbon (an oxocarbon). The possible isomers of carbon trioxide include ones with molecular symmetry point
Carbon_trioxide
Chemical compound
salts, which hydrolyzes upon dilution with water. With nitric acid, the trioxide is oxidized to antimony(V) oxide. When heated with carbon, the oxide is
Antimony_trioxide
Chemical compound
Molybdenum trioxide describes a family of inorganic compounds with the formula MoO3(H2O)n where n = 0, 1, 2. The anhydrous compound is produced on the
Molybdenum_trioxide
Chemical compound
Tungsten(VI) oxide, also known as tungsten trioxide is a chemical compound of oxygen and the transition metal tungsten, with formula WO3. The compound
Tungsten_trioxide
Chemical compound
Boron trioxide or diboron trioxide is the oxide of boron with the formula B2O3. It is a colorless transparent solid, almost always glassy (amorphous),
Boron_trioxide
Chemical compound
Plutonium trioxide is an inorganic compound of plutonium and oxygen with the chemical formula PuO3. This is a high-order oxide of plutonium where the metal
Plutonium_trioxide
Chemical compound
Rhenium trioxide or rhenium(VI) oxide is an inorganic compound with the formula ReO3. It is a red solid with a metallic lustre that resembles copper in
Rhenium_trioxide
Use of arsenic trioxide as a medication
Arsenic trioxide (ATO) (Latin: Arsenum trioxydatum) is used as a chemotherapeutic agent in the treatment of acute promyelocytic leukemia (APL). It was
Arsenic_trioxide_(medication)
Uranium-Oxygen compound
Uranium trioxide (UO3), also called uranyl oxide, uranium(VI) oxide, and uranic oxide, is the hexavalent oxide of uranium. The solid may be obtained by
Uranium_trioxide
Chemical compound
oxide Systematic IUPAC name Aluminium(III) oxide Other names Dialuminium trioxide Aluminium sesquioxide Identifiers CAS Number 1344-28-1 Y 3D model (JSmol)
Aluminium_oxide
Chemical compound (H2SO4)
sulfuric acid but, to the contrary, dehydrates sulfuric acid to sulfur trioxide. When sulfuric acid is added to water, a considerable amount of heat is
Sulfuric_acid
Mixture of concentrated sulfuric acid and dichromate
aqueous solutions of dichromate. It consists at least in part of chromium trioxide. The term "chromic acid" is usually used for a mixture made by adding concentrated
Chromic_acid
Chemical compound
Trioxidane (systematically named dihydrogen trioxide,), also called hydrogen trioxide is an inorganic compound with the chemical formula H2O3 or O(OH)2
Trioxidane
Chemical compound
Phosphorus trioxide is the chemical compound with the molecular formula P4O6. Although the molecular formula suggests the name tetraphosphorus hexoxide
Phosphorus_trioxide
Chemical compound
Neptunium trioxide is an inorganic compound of neptunium and oxygen with the chemical formula NpO3. Neptunium trioxide can be obtained by oxidating neptunium(V)
Neptunium_trioxide
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
Selenium_trioxide
Chemical element with atomic number 51 (Sb)
improves the rigidity of lead-alloy plates in lead–acid batteries. Antimony trioxide is a prominent additive for halogen-containing flame retardants. Antimony
Antimony
Chemical compound
Polonium trioxide (also known as polonium(VI) oxide) is a chemical compound with the formula PoO3. It is one of three oxides of polonium, the other two
Polonium_trioxide
Corrosive liquid of excess sulfur trioxide in solution
acid, is a term referring to solutions of various compositions of sulfur trioxide in sulfuric acid, or sometimes more specifically to disulfuric acid (also
Oleum
Chemical element with atomic number 86 (Rn)
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
Radon
Chemical compound
Manganese trioxide fluoride is an inorganic compound with the formula MnO3F. A green diamagnetic liquid, the compound has no applications, but it is of
Manganese_trioxide_fluoride
Chemical compound
Dibromine trioxide is the chemical compound composed of bromine and oxygen with the formula Br2O3. It is an orange solid that is stable below −40 °C. It
Dibromine_trioxide
Subtype of acute myeloid leukaemia characterised by accumulation of promyelocytes
arsenic trioxide. They proposed that oral arsenic trioxide had a short-term efficacy and safety profile similar to intravenous arsenic trioxide. They then
Acute_promyelocytic_leukemia
Chemical compound
when doped with nitrogen ions or doped with metal oxide like tungsten trioxide, exhibits excitation also under visible light. The strong oxidative potential
Titanium_dioxide
Chemical compound
Sulfur trioxide pyridine complex is the compound with the formula C5H5NSO3. It is a colourless solid that dissolves in polar organic solvents. It is the
Sulfur trioxide pyridine complex
Sulfur_trioxide_pyridine_complex
Chemical compound
Rhenium trioxide fluoride is an inorganic compound with the formula ReO3F. It is a white, sublimable, diamagnetic solid, although impure samples appear
Rhenium_trioxide_fluoride
Chemical compound
Methylrhenium trioxide, also known as methyltrioxorhenium(VII), is an organometallic compound with the formula CH3−ReO3. It is a volatile, colourless solid
Methylrhenium_trioxide
Dental restoration technique
small amount of a sedative dressing, such as calcium hydroxide or mineral trioxide aggregate (MTA). These materials protect the pulp from noxious agents (heat
Pulp_capping
Chemical compound
conductivity, but its most mature use is as a colorant in pyrotechnics. Bismuth trioxide has five crystallographic polymorphs. The room temperature phase, α-Bi2O3
Bismuth(III)_oxide
Dental material
Mineral trioxide aggregate (MTA) is an alkaline, cementitious dental repair material. MTA is used for creating apical plugs during apexification, repairing
Mineral_trioxide_aggregate
Chemical compound
Iron(III) oxide or ferric oxide is the inorganic compound with the formula Fe2O3. It occurs in nature as the mineral hematite, which serves as the primary
Iron(III)_oxide
Chemical compound
oxide, also known as cerium oxide, cerium trioxide, cerium sesquioxide, cerous oxide or dicerium trioxide, is an oxide of the rare-earth metal cerium
Cerium(III)_oxide
Chemical compound
Rhenium trioxide chloride can be prepared by chlorination of rhenium trioxide: 2 ReO3 + Cl2 → 2 ReO3Cl With Lewis bases (L), rhenium trioxide chloride
Rhenium_trioxide_chloride
Chemical element with atomic number 33 (As)
semiconductor gallium arsenide. Arsenic and its compounds, especially the trioxide, are used in the production of pesticides, treated wood products, herbicides
Arsenic
Hong Kong Haematologist
neoplasms. Prof Kwong has pioneered the development and use of oral arsenic trioxide in the treatment of acute promyelocytic leukaemia and other blood cancers
Kwong_Yok_Lam
Method for detecting arsenic
forensic toxicology until the 1970s. Arsenic, in the form of white arsenic trioxide As2O3, was a highly favored poison, being odourless, easily incorporated
Marsh_test
Chemical compound
Dichlorine trioxide, Cl2O3, is a chlorine oxide. It is a dark brown solid discovered in 1967 which is explosive even below 0 °C. It is formed by the low-temperature
Dichlorine_trioxide
Chemical compound
of which the monoclinic β-phase is the most stable. Hydrated gallium trioxide precipitated upon neutralization of acidic or basic solution of gallium
Gallium(III)_oxide
Chemical compound
Strontium titanate is an oxide of strontium and titanium with the chemical formula SrTiO3. At room temperature, it is a centrosymmetric paraelectric material
Strontium_titanate
be used in apexification such as Mineral trioxide aggregate (MTA), Bioceramics and Biodentine. Mineral trioxide aggregate (MTA) is composed primarily of
Apexification
Index of chemical compounds with the same name
trioxide (NO3), or nitrate radical Nitrous oxide (N2O), nitrogen(0,II) oxide Dinitrogen dioxide (N2O2), nitrogen(II) oxide dimer Dinitrogen trioxide (N2O3)
Nitrogen_oxide
Chemical compound
Manganese(III) oxide Names Other names dimanganese trioxide, manganese sesquioxide, manganic oxide, manganous oxide Identifiers CAS Number 1317-34-6 Y
Manganese(III)_oxide
Chemical compound
Tellurium trioxide (TeO3) is an inorganic chemical compound of tellurium and oxygen. In this compound, tellurium is in the +6 oxidation state. There are
Tellurium_trioxide
Chemical compound
Gadolinium(III) oxide Names Other names gadolinium sesquioxide, gadolinium trioxide Identifiers CAS Number 12064-62-9 Y 3D model (JSmol) Interactive image
Gadolinium(III)_oxide
Index of chemical compounds with the same name
peroxide radical chlorine dioxide, ClO2, chlorine (IV) oxide chlorine trioxide radical, ClO3•, chlorine (VI) oxide radical chlorine tetroxide radical
Chlorine_oxide
Chemical data page
This page provides supplementary chemical data on boron trioxide. MSDS from SIRI This box: view edit Except where noted otherwise, data relate to
Boron_trioxide_(data_page)
Industrial method of sulfuric acid production
previous lead chamber process, the contact process also produces sulfur trioxide and oleum. In 1890 John Brown Francis Herreshoff developed a form of the
Contact_process
Defunct gold mine in Northwest Territories, Canada (1948–2004)
remediation is an "effective, long-term management" of arsenic trioxide. Arsenic trioxide dust, which contains approximately 60% arsenic, is highly lethal
Giant_Mine
Chemical data page
This page provides supplementary chemical data on bismuth(III) oxide. MSDS from Fischer Scientific This box: view edit Except where noted otherwise
Bismuth(III) oxide (data page)
Bismuth(III)_oxide_(data_page)
Chemical compound
Lanthanum(III) oxide, also known as lanthana, chemical formula La2O3, is an inorganic compound containing the rare-earth element lanthanum and oxygen.
Lanthanum_oxide
Chemical compound
Barium titanate (BTO) is an inorganic compound with chemical formula BaTiO3. It is the barium salt of metatitanic acid. Barium titanate appears white as
Barium_titanate
Blue solid oxide of tungsten formed by reaction of tungsten trioxide and tungsten metal
intermediate oxides are formed from reacting tungsten metal and tungsten trioxide (WO3), including W20O58 and W24O70. W18O49 contains both octahedral and
Intermediate oxides of tungsten
Intermediate_oxides_of_tungsten
Oxidation of alcohol
pyridine complex of chromium trioxide ("Collins reagent"). Jones reagent is a solution prepared by dissolving chromium trioxide in aqueous sulfuric acid.
Jones_oxidation
Chemical compound
europium(III) salts. Cubic Eu2O3 Monoclinic Eu2O3 Webelements Europium trioxide "Europium and the Euro". Archived from the original on 2009-08-04. Retrieved
Europium(III)_oxide
Chemical compound
oxide Names IUPAC name Yttrium(III) oxide. Other names Yttria, diyttrium trioxide, yttrium sesquioxide Identifiers CAS Number 1314-36-9 Y 3D model (JSmol)
Yttrium(III)_oxide
Chemical compound
names Chlorine(VII) oxide Perchloric anhydride (Perchloryloxy)chlorane trioxide Identifiers CAS Number 12015-53-1 Y 3D model (JSmol) Interactive image
Dichlorine_heptoxide
Chemical compound
Nb5+ __ O2− Names Other names Lithium niobium oxide, lithium niobium trioxide Identifiers CAS Number 12031-63-9 Y 3D model (JSmol) Interactive image
Lithium_niobate
Chemical compound
Nitrogen trioxide or nitrate radical is an oxide of nitrogen with formula NO 3, consisting of three oxygen atoms covalently bound to a nitrogen atom. This
Nitrate_radical
Chemical compound
Lutetium(III) oxide, a white solid, is a cubic compound of lutetium sometimes used in the preparation of specialty glasses. It is also called lutecia.
Lutetium(III)_oxide
Chemical compound
tetrahedral InO45− ions was prepared. Reacting with a range of metal trioxides produces perovskites for example: In2O3 + Cr2O3 → 2InCrO3 Indium oxide
Indium(III)_oxide
Chemical compound
Rhenium trioxynitrate, also known as rhenium(VII) trioxide nitrate, is a chemical compound with the formula ReO3NO3. It is a white solid that readily hydrolyzes
Rhenium_trioxynitrate
Bismuth trioxide, or Bi2O3
Bismite is a bismuth oxide mineral, bismuth trioxide or Bi2O3. It is a monoclinic mineral, but the typical form of occurrence is massive and clay-like
Bismite
Chemical compound
perchlorating agent. It was originally reported to exist as the monomeric chlorine trioxide ClO3 in gas phase, but was later shown to remain an oxygen-bridged dimer
Dichlorine_hexoxide
Chemical compound
oxygen (O2), uranium dioxide (UO2) is oxidized to U3O8, whereas uranium trioxide (UO3) loses oxygen at temperatures above 500 °C and is reduced to U3O8
Triuranium_octoxide
Process of increasing the rate of a chemical reaction
hydrogenation, and vanadium(V) oxide for oxidation of sulfur dioxide into sulfur trioxide by the contact process. Diverse mechanisms for reactions on surfaces are
Catalysis
Rain that is unusually acidic
reduced ability to remove respiratory infections. The effects of sulfur trioxide and sulfuric acid are similar because they both produce sulfuric acid when
Acid_rain
Chemical compound
Terbium(III) oxide Names IUPAC name terbium(III) oxide Other names terbium trioxide, terbia, terbium sesquioxide Identifiers CAS Number 12036-41-8 Y 3D model
Terbium(III)_oxide
Chemical compound
The compound is rarely obtained pure. Upon standing with excess sulfur trioxide, it decomposes to pyrosulfuryl chlorides: 2 ClSO3H + SO3 → H2SO4 + S2O5Cl2
Chlorosulfuric_acid
Chemical compound
Names IUPAC name Nickel (III) oxide Other names Nickel sesquioxide, nickel trioxide Identifiers CAS Number 1314-06-3 Y 3D model (JSmol) Interactive image ChemSpider
Nickel(III)_oxide
Oxide compound with a 2:3 ratio of a given element to oxygen
covalent, e.g. boron trioxide B2O3, dinitrogen trioxide N2O3 and phosphorus(III) oxide P4O6; chlorine trioxide Cl2O3 and bromine trioxide Br2O3 do not have
Sesquioxide
Index of chemical compounds with the same name
which includes the hypothetical compound chromium(II) chromate Chromium trioxide (chromium(VI) oxide), CrO3 Chromium(VI) oxide peroxide, CrO5 Mixed valence
Chromium_oxide
Sb2(SO4)3 Antimony trichloride – SbCl3 Antimony trifluoride – SbF3 Antimony trioxide – Sb2O3 Antimony trisulfide – Sb2S3 Antimony pentasulfide – Sb2S5 Argon
List_of_inorganic_compounds
Chemical compound
2Pu2O3 + O2 → 4PuO2 "WebElements Periodic Table » Plutonium » diplutonium trioxide". webelements.com. Retrieved 26 November 2025. Jomard, Gérald; Amadon,
Plutonium(III)_oxide
Dental procedure to clean out diseased inner tissue from a primary tooth
Solution of formocresol, ferric sulfate, calcium hydroxide or mineral trioxide aggregate (MTA). MTA is a more recent material used for pulpotomies with
Pulpotomy
Chemical compound used to oxidize another substance in a chemical reaction
Hexavalent chromium compounds such as chromic and dichromic acids and chromium trioxide, pyridinium chlorochromate (PCC), and chromate/dichromate compounds such
Oxidizing_agent
Organic compounds with the structure R–S(=O)2–OH
sulfonate salts are produced by treatment of organic compounds with sulfur trioxide. One large scale application of this method is the production of alkylbenzenesulfonic
Sulfonic_acid
Chemical reaction
sulfoxide (DMSO) as the oxidant and the solvent, activated by the sulfur trioxide pyridine complex (SO3•C5H5N) in the presence of triethylamine or diisopropylethylamine
Parikh–Doering_oxidation
Small molecules that inhibit the Hedgehog signaling pathway
which are being used for the treatment of basal cell carcinoma. Arsenic trioxide, an inhibitor of GLI transcription factors, is being used for the treatment
Hedgehog_pathway_inhibitor
Undecacaesium trioxide (Cs11O3) Undecacaesium monorubidium trioxide (Cs11RbO3) Undecacaesium dirubidium trioxide (Cs11Rb2O3) Undecacaesium trirubidium trioxide (Cs11Rb3O3)
List_of_alkali_metal_oxides
Chemical compound
of polonium, the other two being polonium monoxide (PoO) and polonium trioxide (PoO3). It is a pale yellow crystalline solid at room temperature. Under
Polonium_dioxide
Molecular geometry of symmetry D_3h
boron trifluoride (BF3), formaldehyde (H2CO), phosgene (COCl2), and sulfur trioxide (SO3). Some ions with trigonal planar geometry include nitrate (NO− 3)
Trigonal planar molecular geometry
Trigonal_planar_molecular_geometry
Chemical compound
Gold(III) oxide Names IUPAC name Gold(III) oxide Other names Gold trioxide, Gold sesquioxide, Auric oxide Identifiers CAS Number 1303-58-8 Y 3D model (JSmol)
Gold(III)_oxide
92-proton element with the same mix of isotopes as found in nature, i.e. unenriched
dioxide (UO2) ceramic forms. However, experimental fuelings with uranium trioxide (UO3) and triuranium octaoxide (U3O8) have shown promise. The 0.72% uranium-235
Natural_uranium
Solutions of nitric oxide in dinitrogen tetroxide
Mixed oxides of nitrogen (MON) are solutions of dinitrogen trioxide (N2O3) in dinitrogen tetroxide/nitrogen dioxide (N2O4 and NO2). It may be used as an
Mixed_oxides_of_nitrogen
Chemical compound
melts at 205 °C before decomposing at higher temperatures to water, sulfur trioxide, sulfur dioxide and nitrogen. Sulfamic acid (H3NSO3) may be considered
Sulfamic_acid
German multinational footwear retailer
under the company's own 5th Avenue brand being contaminated by chromium trioxide between 2012 and 2014. Deichmann SE is a member of the cads association
Deichmann_SE
Chemical compound
dioxide, which is separately oxidized to sulfur trioxide: S + O2 → SO2 2 SO2 + O2 → 2 SO3 Finally the trioxide is converted to sulfuric acid by a hydration
Oxide
Chemical compound
Thallium(III) oxide Names Other names thallium trioxide, thallium sesquioxide Identifiers CAS Number 1314-32-5 Y 3D model (JSmol) Interactive image ChemSpider
Thallium(III)_oxide
Molybdite is the naturally occurring mineral form of molybdenum trioxide MoO3. It occurs as yellow to greenish needles and crystallizes in the orthorhombic
Molybdite
Type of firework
toxic compounds once used, particularly lead tetroxide Pb3O4. Bismuth trioxide or bismuth subcarbonate are commonly used as more environmentally friendly
Dragon's_egg
Chemical element with atomic number 34 (Se)
+ H2O → 3 H2SeO3 + 4 NO Unlike sulfur, which forms a stable trioxide, selenium trioxide is thermodynamically unstable and decomposes to the dioxide above
Selenium
rhenate. Rhenium(VI) oxide, or rhenium trioxide, is another oxide of rhenium. It is the only stable group 7 trioxide. It has an appearance somewhat like
Rhenium_compounds
Chemical compound
Nickel(IV) titanate Other names Nickel titanium oxide Nickel titanium trioxide Titanium nickel oxide Identifiers CAS Number 12035-39-1 3D model (JSmol)
Nickel(II)_titanate
Type of oxide
[Fe(H2O)6]2+ → FeO + 2 H+ + 5 H2O Chromium trioxide is the anhydride of chromic acid: H2CrO4 → H2O + CrO3 Vanadium trioxide is the anhydride of vanadous acid:
Acidic_oxide
TRIOXIDE
TRIOXIDE
TRIOXIDE
TRIOXIDE
Boy/Male
Hebrew
Gift from God.
Female
Greek
 Feminine form of Greek Dorotheos, DOROTHEA means "gift of God." Compare with another form of Dorothea.
Surname or Lastname
English
English : from the Old French personal name Malhard, composed of the Germanic elements madal ‘council’ + hard ‘hardy’, ‘brave’, ‘strong’. This was introduced to Britain by the Normans.English : nickname for someone supposedly resembling a male wild duck, Middle English, Old French malard.
Girl/Female
Australian, Modern
A Flower
Surname or Lastname
English
English : from the Middle English personal name Algod, Alegod, Halgod, of Scandinavian origin. Compare Old Danish Algot, from an unattested Alf-gautr ‘elf Goth’ or A{dh}al-gautr ‘noble Goth’.
Girl/Female
English
Means light or most beautiful woman.
Boy/Male
Hindu, Indian
King of Stars
Girl/Female
Russian
Pure.
Boy/Male
English German Latin
Trees; sylvan. See also Sylvester and Silvano.
Surname or Lastname
Irish
Irish : in County Donegal this is an Anglicized form of Gaelic Mac an Deagánaigh ‘son of the deacon’ (see Deacon); in County Tipperary it can be from Gaelic Ó Déaghain ‘descendant of the deacon’. In other cases the surname is of English origin (see Dean 1).English : variant of Dean 1.
TRIOXIDE
TRIOXIDE
TRIOXIDE
TRIOXIDE
TRIOXIDE
n.
An oxide containing three atoms of oxygen; as, sulphur trioxide, SO3; -- formerly called tritoxide.
a.
Pertaining to, derived from, or designating, an acid, HO.C2H4.SO3H, obtained as an oily or crystalline substance, by the action of sulphur trioxide on alcohol or ether. It is derivative of sulphuric acid.
n.
Bismuth trioxide, or bismuth ocher.
n.
A term used for the Powder of Algaroth, a white powder which is a compound of trichloride and trioxide of antimony. It was formerly used in medicine as an emetic, purgative, and diaphoretic.