{{위키데이터 속성 추적}}
{{chembox
| Verifiedfields = changed
| Watchedfields  = changed
| verifiedrevid  = 455055388
| Name           = 붕사<br>Borax
| OtherNames     = Borax octahydrate
| ImageFile      = Borax crystals.jpg
| ImageName      = Borax crystals
| ImageSize      = 260px
| ImageFile1     = BoraxChem.png
| ImageName1     = Ball-and-stick model of the unit cell of borax decahydrate
| ImageSize1     = 244px
| IUPACName      = Sodium tetraborate decahydrate
| SystematicName = 
| Section1       = {{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 17339255
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 91MBZ8H3QO
| ChEMBL_Ref = {{ebicite|changed|EBI}}
| ChEMBL = 1076681
| ChEBI_Ref = {{ebicite|changed|EBI}}
| ChEBI = 86222
| InChI = 1/B4O7.2Na.10H2O/c5-1-7-3-9-2(6)10-4(8-1)11-3;;;;;;;;;;;;/h;;;10*1H2/q-2;2*+1;;;;;;;;;;
| SMILES = [Na+].[Na+].O0B(O)O[B-]1(O)OB(O)O[B-]0(O)O1.O.O.O.O.O.O.O.O
| InChIKey = CDMADVZSLOHIFP-UHFFFAOYAP
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/B4O7.2Na.10H2O/c5-1-7-3-9-2(6)10-4(8-1)11-3;;;;;;;;;;;;/h;;;10*1H2/q-2;2*+1;;;;;;;;;;
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = CDMADVZSLOHIFP-UHFFFAOYSA-N
| CASNo = 1330-43-4
| CASNo_Comment = (anhydrous)
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo1 = 1303-96-4
| CASNo1_Comment = (decahydrate)
| EINECS = 215-540-4
| PubChem = 11954323
| KEGG_Ref = {{keggcite|changed|kegg}}
| KEGG = D03243
 }}
| Section2       = {{Chembox Properties
| Formula = Na{{sub|2}}B{{sub|4}}O{{sub|7}}·10H{{sub|2}}O or Na{{sub|2}}[B{{sub|4}}O{{sub|5}}(OH){{sub|4}}]·8H{{sub|2}}O
| MolarMass = 201.22 (anhydrous)<br />381.38 (decahydrate)
| Appearance = white solid
| Density = 2.4 g/cm{{sup|3}} (anhydrous, solid)<ref name="crc97">Haynes, p. 4.91</ref><br />1.73 g/cm{{sup|3}} (decahydrate, solid)<ref name="crc97" />
| Solubility = 31.7 g/L (both)<ref name="crc97"/>
| MeltingPtC = 743
| MeltingPt_notes = (anhydrous)<ref name="crc97"/><br />75&nbsp;°C (decahydrate, decomposes)<ref name="crc97"/>
| BoilingPtC = 1575
| BoilingPt_notes = (anhydrous)<ref name="crc97"/>
| pKb =
| MagSus = −85.0·10{{sup|−6}} cm{{sup|3}}/mol (anhydrous)<ref>Haynes, p. 4.135</ref>
| RefractIndex = n{{sub|1}}=1.447, n{{sub|2}}=1.469, n{{sub|3}}=1.472 (decahydrate)<ref>Haynes, p. 4.139</ref>
  }}
| Section3       = {{Chembox Structure
| Structure_ref =<ref>{{저널 인용|doi=10.1107/S0567740878011504|title=Crystal structures of sodium sulfate decahydrate (Glauber's salt) and sodium tetraborate decahydrate (borax). Redetermination by neutron diffraction|journal=Acta Crystallographica Section B|volume=34|issue=12|pages=3502–3510|year=1978|last1=Levy|first1=H. A.|last2=Lisensky|first2=G. C.|doi-access=free}}</ref>
| CrystalStruct = [[Monoclinic]], [[Pearson symbol|mS92]], No. 15
| SpaceGroup = C2/c
| PointGroup = 2/m
| LattConst_a = 1.1885 nm
| LattConst_b = 1.0654 nm
| LattConst_c = 1.2206 nm
| UnitCellFormulas = 4
| UnitCellVolume = 1.4810 nm{{sup|3}}
| LattConst_alpha =
| LattConst_beta = 106.623°
| LattConst_gamma =
| Coordination =
| MolShape =
| OrbitalHybridisation =
| Dipole =
  }}
| Section4       = 
| Section5       = 
| Section6       = {{Chembox Pharmacology
| ATCCode_prefix = S01
| ATCCode_suffix = AX07
}}
| Section7       = {{Chembox Hazards
| NFPA-H = 1
| NFPA-F = 0
| NFPA-R = 0
| NFPA_ref =<ref>{{웹 인용|url=http://tlsoakland.com/pdf/12.pdf|title=Potential Commodities NFPA 704|access-date=December 9, 2018|archive-url=https://web.archive.org/web/20160517223018/http://tlsoakland.com/pdf/12.pdf|archive-date=May 17, 2016|url-status=dead}}</ref>
| IDLH = N.D.<ref name=PGCH57>{{PGCH|0057}}</ref>
| REL = TWA 1 mg/m{{sup|3}} (anhydrous and pentahydrate)<ref name=PGCH57/><ref>{{PGCH|0059}}</ref><br /> TWA 5 mg/m{{sup|3}} (decahydrate)<ref>{{PGCH|0058}}</ref>
| PEL = none<ref name=PGCH57/>
| GHSPictograms = {{GHS08}}
| HPhrases = {{H-phrases|360}}
| PPhrases = {{P-phrases|201|308+313}}
 }}
<!--{{Chembox/DeltaHf298|-3276.75}}
{{Chembox/S298|189.53}}
-->| Section8       = {{Chembox Related
| OtherAnions = [[Sodium aluminate]]
| OtherCations = [[Lithium tetraborate]]
| OtherCompounds = [[Boric acid]], [[sodium perborate]]}}
}}

'''붕사'''(硼砂)는 [[붕소]] 화합물이다. 굳어진 붕사는 하얀색이고, 물에 쉽게 용해되는 무색의 부드러운 수정으로 구성돼 있다. 붕사는 여러 용도로 쓰인다. [[세제]], [[화장품]], [[법랑]] 등에 쓰인다. 또한 [[완충용액]], [[방염]], [[항균제]] 등에서 쓰인다. [[영세소규모 금 채광]]에서 붕사를 이용해 [[수은]] 대신 사용하는 방법이 있다. 1900년대 [[필리핀]]에서 많은 채광자들이 붕사를 사용하였다.<ref>{{웹 인용 |url=http://www.blacksmithinstitute.org/newsletter/march-april-filipino-gold-miner-reveals-borax-secret-pakistan-s-pollution-problem.html |제목=보관된 사본 |확인날짜=2016년 8월 7일 |보존url=https://web.archive.org/web/20161013010249/http://www.blacksmithinstitute.org/newsletter/march-april-filipino-gold-miner-reveals-borax-secret-pakistan-s-pollution-problem.html#topic1 |보존날짜=2016년 10월 13일 |url-status=dead }}</ref>

붕사는 영어로 'Borax"인데, 이는 [[아랍어]] būraq (بورق)에서 유래된 말로, '하얗다'는 의미이다.<ref name=amoz>{{웹 인용|url=http://www.azom.com/article.aspx?ArticleID=2588|title=Borax ( Na2B4O7. 10H2O ) – Sodium Borate – Occurrence, Discovery and Applications|work=Amoz.com}}</ref>

== 같이 보기 ==
* [[수소화 붕소 나트륨]]
== 각주 ==
{{각주}}

== 외부 링크 ==
* {{위키공용분류-줄}}
* {{두피디아|101013000710303}}

{{전거 통제}}

{{토막글|화학}}

[[분류:붕소]]
[[분류:감미료]]
[[분류:나트륨 화합물]]