{{위키데이터 속성 추적}}
{{Chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 476993317
| Name = 삼산화 황<br>
| ImageFile = 
| ImageFileL1 = Sulfur-trioxide-2D-dimensions.svg
| ImageNameL1 = Structure and dimensions of sulfur trioxide
| ImageFileR1 = Sulfur-trioxide-3D-vdW.png
| ImageNameR1 = Space-filling model of sulfur trioxide
| PIN = Sulfur trioxide
| SystematicName = Sulfonylideneoxidane
| OtherNames = Sulfuric anhydride, Sulfur(VI) oxide
| IUPACName = 
| Section1 = {{Chembox Identifiers
| InChI1 = 1/O3S/c1-4(2)3
| InChIKey1 = AKEJUJNQAAGONA-UHFFFAOYAX
| CASNo = 7446-11-9
| CASNo_Ref = {{cascite|correct|CAS}}
| UNII_Ref = {{fdacite|changed|FDA}}
| UNII = HH2O7V4LYD
| PubChem = 24682
| PubChem1 = 22235242
| PubChem1_Comment = <br>(hemihydrate)
| PubChem2 = 23035042
| PubChem2_Comment = (monohydrate)
| ChemSpiderID = 23080
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| EINECS = 231-197-3
| UNNumber = UN 1829
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 29384
| RTECS = WT4830000
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/O3S/c1-4(2)3
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = AKEJUJNQAAGONA-UHFFFAOYSA-N
| SMILES = O=S(=O)=O
| SMILES_Comment = monomer
| SMILES1 = O=S0(=O)OS(=O)(=O)OS(=O)(=O)O0
| SMILES1_Comment = ''γ''-trimer
| SMILES2 = OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)OS(=O)(=O)O
| SMILES2_Comment = ''α''/''β'' polymer
| InChI = 1S/O3S/c1-4(2)3
| InChIKey = AKEJUJNQAAGONA-UHFFFAOYSA-N
| Gmelin = 1448
 }}
| Section2 = {{Chembox Properties
| Formula = SO<sub>3</sub>
| MolarMass = 80.066{{nbsp}}g/mol<!--2009Weight-->
| Density = 1.92{{nbsp}}g/cm<sup>3</sup>, liquid
| MeltingPtC = 16.9
| MeltingPt_notes =
| BoilingPtC = 45
| Solubility = Reacts to give [[sulfuric acid]]
| Appearance = Colorless to white crystalline solid which will fume in air.<ref>{{
    웹 인용
    | title=SULFUR TRIOXIDE CAMEO Chemicals NOAA
    | url=https://cameochemicals.noaa.gov/chemical/1560
    | website=Cameochemicals.noaa.gov
  }}</ref> Colorless liquid and gas.<ref name="Lerner">{{서적 인용| title=Small-Scale Synthesis of Laboratory Reagents with Reaction Modeling  | author=Lerner, L.  | isbn=9781439813133  | lccn=2010038460  | url=https://books.google.com/books?id=VqosZeMjNjEC&pg=PA10  | page = 10  | year=2011  | publisher=CRC Press}}</ref>
| Odor = Varies. Vapor is pungent; like sulfur dioxide.<ref>{{
    웹 인용
    | title=Substance:Sulfur trioxide - Learn Chemistry Wiki
    | url=http://www.rsc.org/learn-chemistry/wiki/Substance:Sulfur_trioxide
    | website=Rsc.org
  }}</ref> Mist is odorless.<ref name="Lerner" />
}}
| Section3 = 
| Section4 = {{Chembox Thermochemistry
| DeltaHf = −395.7{{nbsp}}kJ/mol
| Entropy = 256.77{{nbsp}}JK<sup>−1</sup>mol<sup>−1</sup>}}
| Section5 = 
| Section6 = 
| Section7 = {{Chembox Hazards
| ExternalSDS = [https://web.archive.org/web/20111019000350/http://inchem.org/documents/icsc/icsc/eics1202.htm ICSC 1202]
| MainHazards = Highly corrosive
| GHSPictograms = {{GHS05}} {{GHS07}}
| GHSSignalWord = '''Danger'''
| HPhrases = {{H-phrases|314|335}}
| PPhrases = {{P-phrases|261|280|305+351+338|310}}<ref>{{웹 인용|title=Sulfur trioxide 227692 |url=https://www.sigmaaldrich.com/catalog/product/aldrich/227692?lang=en&region=GB |website=SO3 |accessdate=1 September 2020 |archiveurl=https://archive.org/download/so3-msds/SO3%20MSDS.pdf |archivedate=2020-09-01}}</ref>
| NFPA-H = 3
| NFPA-F = 0
| NFPA-R = 3
| NFPA-S = W+OX
| FlashPt = Non-flammable
| LD50 =
| LC50 = rat, 4{{nbsp}}hr 375{{nbsp}}mg/m{{sup|3}}
| PEL =
  }}
| Section8 = {{Chembox Related
| OtherAnions =
| OtherCations = [[Selenium trioxide]]<br />[[Tellurium trioxide]]
| OtherFunction = [[Sulfur monoxide]]<br />[[Sulfur dioxide]]
| OtherFunction_label = [[sulfur]] [[oxide]]s
| OtherCompounds = [[Sulfuric acid]]
  }}
}}
'''삼산화황'''(三酸化黃, sulfur trioxide)은 화학식 SO<sub>3</sub>인 무기 화합물이다. [[산소]] 원자 3개와 [[황]] 원자 1개가 결합되어 있다.

== 같이 보기 ==
{{위키공용분류}}
* [[이산화 황]]

== 각주 ==
{{각주}}

{{전거 통제}}
{{토막글|화학}}

[[분류:무기 황 화합물]]
[[분류:산성 산화물]]
[[분류:황 산화물]]
[[분류:산 무수물]]