{{Chembox
| Watchedfields = changed
|  verifiedrevid = 464364488
|  ImageFile1 = Ammonia-dimensions-from-Greenwood&Earnshaw-2D.png
|   ImageSize1 = 200px
|   ImageName1 = Stereo structural formula o ammonia
|  ImageFileL1 = Ammonia-3D-balls-A.png
|   ImageSizeL1 = 125px
|   ImageNameL1 = Baw-an-stick model o the ammonia molecule
|  ImageFileR1 = Ammonia-3D-vdW.png
|   ImageSizeR1 = 125 px
|   ImageNameR1 = Space-fillin model o the ammonia molecule
| IUPACName = Azane
|  OtherNames = Hydrogen nitride<br />
Trihydrogen nitride<br />
Nitro-Sil
| Section1 = {{Chembox Identifiers
|  InChI = 1/H3N/h1H3
| InChIKey = QGZKDVFQNNGYKY-UHFFFAOYAF
| CASNo = 7664-41-7
|   CASNo_Ref = {{cascite|correct|CAS}}
|  PubChem = 222
|   PubChem_Ref = {{Pubchemcite}}
| ChEMBL_Ref = {{ebicite|correct|EBI}}
| ChEMBL = 1160819
|  ChemSpiderID = 217
|   ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
|  UNII = 5138Q19F1X
|   UNII_Ref = {{fdacite|correct|FDA}}
|  EINECS = 231-635-3
|  UNNumber = 1005
|  KEGG_Ref = {{keggcite|correct|kegg}}
| KEGG = D02916
|  MeSHName = Ammonia
|  ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 16134
|  RTECS = BO0875000
|  SMILES = N
|  StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/H3N/h1H3
|  StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = QGZKDVFQNNGYKY-UHFFFAOYSA-N
|  Beilstein = 3587154
|  Gmelin = 79
|  3DMet = B00004}}
| Section2 = {{Chembox Properties
| Formula = NH<sub>3</sub>
| MolarMass = 17.031 g/mol
| Appearance = Colourless gas
| Odor = strong pungent odor
| Density = 0.86&nbsp;kg/m<sup>3</sup> (1.013 bar at boiling point)<br />0.73&nbsp;kg/m<sup>3</sup> (1.013 bar at 15&nbsp;°C)<br />681.9&nbsp;kg/m<sup>3</sup> at −33.3&nbsp;°C (liquid)<ref>{{cite book|url=http://books.google.com/?id=qPGzhL3Y50YC&pg=PA132|page=132|title=Systematic Inorganic Chemistry|author=Yost, Don M.|chapter=Ammonia and Liquid Ammonia Solutions|publisher=READ BOOKS|year=2007|isbn=1-4067-7302-6}}</ref><br />817&nbsp;kg/m<sup>3</sup> at −80&nbsp;°C (transparent solid)<ref>{{cite journal|doi=10.1080/00337577508240819|title=On crystalline character of transparent solid ammonia|year=1975|author=Blum, Alexander|journal=Radiation Effects and Defects in Solids|volume=24|issue=4|page=277}}</ref>
| MeltingPtC = −77.73
| BoilingPtC = −33.34
| Solubility = 47% (0&nbsp;°C)<br />31% (25&nbsp;°C)<br />28% (50&nbsp;°C)<ref>{{cite book|url=http://books.google.com/?id=0fT4wfhF1AsC&pg=PA17|page=17|title=Handbook of inorganic compounds |author=Perry, Dale L.; Phillips, Sidney L.|publisher=CRC Press|year=1995|isbn=0-8493-8671-3}}</ref>
| SolubleOther = soluble in [[chloroform]], [[ether]], [[ethanol]], [[methanol]]
| Solvent =
| pKa = 32.5 (−33&nbsp;°C),<ref>Perrin, D. D., ''Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution''; 2nd Ed., Pergamon Press: Oxford, '''1982'''.</ref> 10.5 (DMSO)
| pKb = 4.75
| RefractIndex = 1.3327
| Viscosity = 0.276 cP (-40 °C)
| VaporPressure = 8573 h Pa
}}
| Section3 = {{Chembox Structure
| MolShape = [[Trigonal pyramid (chemistry)|Trigonal pyramid]]
| Dipole = 1.42 [[Debye|D]]
}}
| Section4 = {{Chembox Thermochemistry
|   DeltaHf = −46&nbsp;kJ·mol<sup>−1</sup><ref name=b1>{{cite book| author = Zumdahl, Steven S.|title =Chemical Principles 6th Ed| url = https://archive.org/details/chemicalprincipl0000zumd_u9g0| publisher = Houghton Mifflin Company| year = 2009| isbn = 0-618-94690-X|page=A22}}</ref>
|   Entropy = 193&nbsp;J·mol<sup>−1</sup>·K<sup>−1</sup><ref name=b1/>
 }}
| Section7 = {{Chembox Hazards
|   GHSPictograms = {{GHSp|GHS04}}{{GHSp|GHS05}}{{GHSp|GHS06}}{{GHSp|GHS09}}<ref name="sigma">{{Sigma-Aldrich|id=294993|name=Ammonia|accessdate=2013-07-20}}</ref>
|   HPhrases = {{H-phrases|221|280|314|331|400}}<ref name="sigma" />
|   PPhrases = {{P-phrases|210|261|273|280|305+351+338|310}}<ref name="sigma" />
| External MSDS = [http://www.inchem.org/documents/icsc/icsc/eics0414.htm ICSC 0414] (anhydrous)
| EUIndex = 007-001-00-5 (anhydrous)<br />007-001-01-2 (solutions)
| EUClass = {{Hazchem T}} {{Hazchem C}} {{Hazchem N}}
| NFPA-H = 3
| NFPA-F = 1
| NFPA-R = 0
| NFPA-O =
| RPhrases = {{R10}}, {{R23}}, {{R34}}, {{R50}}
| SPhrases = {{S1/2}}, {{S9}}, {{S16}}, {{S26}}, {{S36/37/39}}, {{S45}}, {{S61}}
| FlashPt = flammable gas (''see text'')
| AutoignitionC = 651
| ExploLimits = 15–28%
| PEL = 50 ppm (25 ppm [[ACGIH]]- TLV; 35 ppm [[STEL]])
| LD50 = 0.015 mL/kg (human, oral)
}}
| Section8 = {{Chembox Related
| OtherAnions =
| OtherCations = [[Phosphine]]<br />[[Arsine]]<br />[[Stibine]]
| OtherFunctn = [[Hydrazine]]<br />[[Hydrazoic acid]]
| Function = nitrogen hydrides
| OtherCpds = [[Ammonium hydroxide]]
}}
}}
'''Ammonia''' or '''azane''' is a [[chemical compound|compoond]] o [[nitrogen]] an [[hydrogen]] wi the [[chemical formula|formula]] NH<sub>3</sub>. It is a colourless [[gas]] wi a characteristic [[pungent]] [[odor|smell]]. Ammonia contreibutes signeeficantly tae the [[nutreetion]]al needs o terrestrial organisms bi serving as a precursor tae [[fuid]] an [[fertilizer]]s. Ammonia, either directly or indirectly, is an aa a biggin-block for the synthesis o mony [[pharmaceuticals]] an is uised in mony commercial cleanin products. Altho in wide uise, ammonia is baith [[Caustic (substance)|caustic]] an [[hazard]]ous. The global industrial production o ammonia for 2012 wis anticipatit tae be 198 million tonnes,<ref name="ceresana1">{{cite web |author=Ceresana |url=http://www.ceresana.com/en/market-studies/chemicals/ammonia/ceresana-market-study-ammonia.html |title=Market Study Ammonia |publisher=Ceresana |date= |accessdate=2012-11-07 |archive-date=2019-10-09 |archive-url=https://web.archive.org/web/20191009121132/https://www.ceresana.com/en/market-studies/chemicals/ammonia/ceresana-market-study-ammonia.html |url-status=dead }}</ref> a 35% increase ower the estimatit 2006 global output o 146.5 million tonnes.<ref name=Ullmann>{{cite book|author=Max Appl |title=Ammonia, in Ullmann's Encyclopedia of Industrial Chemistry|year= 2006|publisher= Wiley-VCH|location= Weinheim|doi=10.1002/14356007.a02_143.pub2}}</ref>