{{위키데이터 속성 추적}}
{{chembox
| Watchedfields  = changed
| verifiedrevid  = 443427049o
| ImageFile      = B2O3powder.JPG
| ImageFile2     = Kristallstruktur Bortrioxid.png
| ImageName      = Crystal structure of B<sub>2</sub>O<sub>3</sub><ref name=a1>{{저널 인용|author1=Gurr, G. E. |author2=Montgomery, P. W. |author3=Knutson, C. D. |author4=Gorres, B. T. | title = The Crystal Structure of Trigonal Diboron Trioxide | journal = Acta Crystallographica B | year = 1970 | volume = 26 | issue = 7 | pages = 906–915 | doi = 10.1107/S0567740870003369 }}</ref>
| OtherNames     = boron oxide, diboron trioxide, boron sesquioxide, boric oxide, boria<br />
Boric anhydride
| IUPACName      = Diboron trioxide
| Section1       = {{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 452485
| InChI = 1/B2O3/c3-1-5-2-4
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 30163
| Gmelin = 11108
| SMILES = O=BOB=O
| InChIKey = JKWMSGQKBLHBQQ-UHFFFAOYAI
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/B2O3/c3-1-5-2-4
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = JKWMSGQKBLHBQQ-UHFFFAOYSA-N
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 1303-86-2
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 483W67CPF4
| PubChem = 518682
| RTECS = ED7900000
| EINECS = 215-125-8
}}
| Section2       = {{Chembox Properties
| Formula = B<sub>2</sub>O<sub>3</sub>
| MolarMass = 69.6182 g/mol
| Appearance = white, glassy solid
| Density = 2.460 g/cm<sup>3</sup>, liquid;<br/>
2.55 g/cm<sup>3</sup>, trigonal;<br/>
3.11–3.146 g/cm<sup>3</sup>, monoclinic
| MeltingPtC = 450
| MeltingPt_notes = (trigonal) <br> 510&nbsp;°C (tetrahedral)
| BoilingPtC = 1860
| BoilingPt_notes = ,<ref>{{서적 인용|url=https://books.google.com/books?id=ZrxSWmueNMQC&pg=PA496|page=496|title=High temperature corrosion and materials chemistry: proceedings of the Per Kofstad Memorial Symposium. Proceedings of the Electrochemical Society|publisher=The Electrochemical Society|year=2000|isbn=978-1-56677-261-7}}</ref> sublimes at 1500&nbsp;°C<ref name=patnaik>{{서적 인용| last = Patnaik | first = P. | year = 2003 | title = Handbook of Inorganic Chemical Compounds | publisher = McGraw-Hill | page = 119 | isbn =978-0-07-049439-8 | url = https://books.google.com/books?id=Xqj-TTzkvTEC&pg=PA119 | access-date = 2009-06-06 }}</ref>
| Solubility = 1.1 g/100mL (10&nbsp;°C) <br> 3.3 g/100mL (20&nbsp;°C) <br> 15.7 g/100mL (100&nbsp;°C)
| SolubleOther = partially soluble in [[methanol]]
| pKa = ~ 4
| MagSus = −39.0·10<sup>−6</sup> cm<sup>3</sup>/mol
}}
| Section4       = {{Chembox Thermochemistry
| DeltaHf = −1254 kJ/mol
| DeltaGf = −832 kJ/mol
| Entropy = 80.8 J/(mol⋅K)
| HeatCapacity = 66.9 J/(mol⋅K)
}}
| Section7       = {{Chembox Hazards
| GHSPictograms = {{GHS08}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|360FD}}
| PPhrases = {{P-phrases|201|202|281|308+313|405|501}}
| MainHazards = Irritant<ref name=PGCH>{{PGCH|0060}}</ref>
| NFPA-H = 2
| NFPA-F = 0
| NFPA-R = 0
| NFPA-S = 
| FlashPt = noncombustible
| AutoignitionPt = 
| LD50 = 3163 mg/kg (oral, mouse)<ref>{{IDLH|1303862|Boron oxide}}</ref>
| PEL = TWA 15 mg/m<sup>3</sup><ref name=PGCH/>
| REL = TWA 10 mg/m<sup>3</sup><ref name=PGCH/>
| IDLH = 2000 mg/m<sup>3</sup><ref name=PGCH/>
}}
}}
'''삼산화 붕소'''(boron trioxide) 또는 '''삼산화 이붕소'''(diboron trioxide)는 화학식 {{chem2|B2O3}}를 갖는 [[산화 붕소|붕소의 산화물]]이다. 무색 투명한 고체이며 거의 항상 유리질(무정형)이며 결정화하기가 매우 어렵다. 산화붕소 또는 보리아라고도 한다. 이는 주로 유약과 에나멜용 플럭스로서 세라믹과 [[유리]] 생산에 중요한 산업 응용 분야가 많다.

== 반응 ==
용융된 산화붕소는 규산염을 공격한다. 용기는 아세틸렌의 열분해로 얻은 흑연화 탄소층을 사용하여 내부적으로 부동태화할 수 있다.

== 같이 보기 ==
* [[붕산]]

== 각주 ==
{{각주}}

== 외부 링크 ==
* [https://web.archive.org/web/20060209040519/http://www.npi.gov.au/database/substance-info/profiles/15.html National Pollutant Inventory: Boron and compounds]
* [https://web.archive.org/web/20050717211845/http://www.nohsc.gov.au/OHSInformation/Databases/ExposureStandards/az/Boron_oxide.htm Australian Government information]
* [http://toxnet.nlm.nih.gov/cgi-bin/sis/search/r?dbs+hsdb:@term+@rn+@rel+1303-86-2 US NIH hazard information]. See [[NIH]].
* [http://hazard.com/msds/mf/baker/baker/files/b3708.htm Material Safety Data Sheet]
* [https://www.cdc.gov/niosh/npg/npgd0060.html CDC - NIOSH Pocket Guide to Chemical Hazards - Boron oxide]

{{붕소 화합물}}
{{산화물}}
{{전거 통제}}

[[분류:붕소 화합물]]
[[분류:산성 산화물]]
[[분류:삼이산화물]]