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{{chembox {{chembox
| Watchedfields = changed | Watchedfields = changed
| verifiedrevid = 405497362 | verifiedrevid = 430321204
| Name = Barium azide | Name = Barium azide
| ImageFile = Barium azide 50g.jpg
| ImageFile1 = | ImageFile1 = Barium azide.svg
| ImageSize1 = | ImageSize1 =
| OtherNames = barium dinitride | OtherNames = Barium dinitride
| Section1 = {{Chembox Identifiers |Section1={{Chembox Identifiers
| PubChem = 62728 | PubChem = 62728
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 56472 | ChemSpiderID = 56472
| SMILES = .==.== | SMILES = .==.==
| StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI=1S/Ba.2N3/c;2*1-3-2/q+2;2*-1 | StdInChI =1S/Ba.2N3/c;2*1-3-2/q+2;2*-1
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = UUXFWHMUNNXFHD-UHFFFAOYSA-N | StdInChIKey = UUXFWHMUNNXFHD-UHFFFAOYSA-N
| CASNo = 18810-58-7 | CASNo = 18810-58-7
| CASNo_Ref = {{cascite|correct|CAS}} | CASNo_Ref = {{cascite|correct|??}}
| UNNumber = ] | UNNumber = ]
| EINECS = 242-594-6 | EINECS = 242-594-6
| RTECS = | RTECS =
}} }}
| Section2 = {{Chembox Properties |Section2={{Chembox Properties
| Formula = BaN<sub>6</sub> | Formula = {{chem2|Ba(N3)2}}
| MolarMass = 194.23 g/mol | MolarMass = 221.37&nbsp;g/mol
| Appearance = white crystalline solid | Appearance = White crystalline solid
| Odor = odorless | Odor = Odourless
| Density = 2.936 g/cm<ref name="Fedoroff">{{cite book |last= Fedoroff |first= Basil T. |coauthors= Henry A. Aaronson, Earl F. Reese, Oliver E. Sheffield, George D. Clift |title= Encyclopedia of Explosives and Related Items (Vol. 1) |publisher= US Army Research and Development Command TACOM, ARDEC |year= 1960 }}</ref> | Density = 2.936&nbsp;g/cm<sup>3</sup><ref name="Fedoroff">{{cite encyclopedia |last1= Fedoroff |first1= Basil T. |first2= Henry A. |last2= Aaronson |first3= Earl F. |last3= Reese |first4= Oliver E. |last4= Sheffield |first5= George D. |last5= Clift |last6= Dunkle |first6= Cyrus G. |last7= Walter |first7= Hans |last8= McLean |first8= Dan C.|encyclopedia= Encyclopedia of Explosives and Related Items |volume= 1 |publisher= ] TACOM, ARDEC |year= 1960 |url= http://www.dtic.mil/get-tr-doc/pdf?AD=AD0257189}}{{dead link|date=June 2022|bot=medic}}{{cbignore|bot=medic}}</ref>
| Solubility = 11.5 g/100 mL (0°C)<br> 14.98 g/100mL (15.7°C) <br> 15.36 g/100mL (20°C) <br> 22.73 g/100mL (52.1°C) <br> 24.75 g/100mL (70°C)<ref name="Energetic Materials Vol.1" /> | Solubility = 11.5&nbsp;g/100{{nnbsp}}mL (0&nbsp;°C) <br>14.98&nbsp;g/100{{nnbsp}}mL (15.7&nbsp;°C) <br>15.36&nbsp;g/100{{nnbsp}}mL (20&nbsp;°C) <br>22.73&nbsp;g/100{{nnbsp}}mL (52.1&nbsp;°C) <br>24.75&nbsp;g/100{{nnbsp}}mL (70&nbsp;°C)<ref name="Energetic Materials Vol.1" />
| Solvent1 = alcohol | Solvent1 = ethanol
| Solubility1 = 0.017 g/100 mL<ref name="Curtiusandrissom">{{cite journal | last1 = Curtius | first1 = T. | last2 = Rissom | first2 = J. | title = Neue Untersuchungen über den Stickstoffwasserstoff N3H | journal = J. Prakt. Chem. | volume = 58 | pages = p. 261–309 | year = 1898 | doi = 10.1002/prac.18980580113}}</ref> (16°C) | Solubility1 = 0.017&nbsp;g/100{{nnbsp}}mL (16&nbsp;°C)<ref name="Curtiusandrissom">{{cite journal | last1 = Curtius | first1 = T. | author-link1 = Theodor Curtius | last2 = Rissom | first2 = J. | title = Neue Untersuchungen über den Stickstoffwasserstoff N<sub>3</sub>H | journal = ] | language = de | volume = 58 | issue = 1 | pages = 261–309 | year = 1898 | doi = 10.1002/prac.18980580113| url = https://zenodo.org/record/1427998 }}</ref>
| Solvent2 = acetone , ether | Solvent2 = acetone
| Solubility2 = insoluble | Solubility2 = Insoluble
| MeltingPt = 126 °C | Solvent3 = ether
| Solubility3 = Insoluble
⚫ | BoilingPt = 160°C(initial decomposition),<ref name="Ber.Dtsch.Chem">{{cite journal | last = Tiede | first = E. | title = Die Zersetzung der Alkali- und Erdalkali-azide im Hochvakuum zur Reindarstellung von Stickstoff | journal = Ber. Dtsch. Chem. Ges. | volume = 49 | pages = p. 1742–1745 | year = 1916 | doi = 10.1002/cber.19160490234}}</ref> >217°C (deflagrates)<br>180°C(initial decomposition),<ref name="Audrieth">{{cite journal | last = Audrieth | first = L. F. | title = Hydrazoic Acid and Its Inorganic Derivatives | journal = Chem. Rev. | volume = 15 | pages = p. 169–224 | year = 1934 | doi = 10.1021/cr60051a002}}</ref> 225°C explosion
| MeltingPtC = 126
| MeltingPt_notes =
| BoilingPtC = 160
⚫ | BoilingPt_notes = (initial decomposition)<ref name="Ber.Dtsch.Chem">{{cite journal | last = Tiede | first = Erich | title = Die Zersetzung der Alkali- und Erdalkali-azide im Hochvakuum zur Reindarstellung von Stickstoff | journal = ] | language = de | volume = 49 | issue = 2 | pages = 1742–1745 | year = 1916 | doi = 10.1002/cber.19160490234| url = https://zenodo.org/record/1426607 }}</ref> >217&nbsp;°C (deflagrates)<br>180&nbsp;°C (initial decomposition),<ref name="Audrieth">{{cite journal | last = Audrieth | first = L. F. | title = Hydrazoic Acid and Its Inorganic Derivatives | journal = ] | volume = 15 | issue = 2 | pages = 169–224 | year = 1934 | doi = 10.1021/cr60051a002}}</ref> 225&nbsp;°C explosion
}} }}
| Section3 = {{Chembox Structure |Section3={{Chembox Structure
| CrystalStruct = | CrystalStruct = Monoclinic
| SpaceGroup = | SpaceGroup =
}} }}
| Section7 = {{Chembox Hazards |Section7={{Chembox Hazards
| ExternalMSDS = | ExternalSDS =
| GHSPictograms = {{GHS01}}{{GHS06}}
| EUIndex =
| GHSSignalWord = Danger
| EUClass = Highly toxic ('''T+''')<br/>Dangerous for the environment ('''N''')
| HPhrases = {{H-phrases|200|301|331|315|319|335}}
| RPhrases = {{R1}}, {{R23}}, {{R25}}, {{R36}}, {{R37}}, {{R38}}
| PPhrases = {{P-phrases|210|240|264|280|305+351+338|310}}
| SPhrases =
| NFPA-H = | NFPA-H =
| NFPA-F = | NFPA-F =
| NFPA-R = | NFPA-R =
| NFPA-O = | NFPA-S =
| FlashPt = | FlashPt =
| LD50 = mg/kg (oral, rats/mice) | LD50 =
⚫ }}
⚫ | Section8 = {{Chembox Related
⚫ | OtherAnions =
⚫ | OtherCations =
| OtherCpds =
}} }}
⚫ |Section8={{Chembox Related
⚫ | OtherAnions =
⚫ | OtherCations =
| OtherCompounds =
⚫ }}
}} }}


'''Barium azide''' Ba(N<sub>3</sub>)<sub>2</sub> is an inorganic ], is explosive, but less sensitive to mechanical shock than ]. '''Barium azide''' is an inorganic ] with the formula {{chem2|Ba(N3)2}}. It is a ] salt of ]. Like all azides, it is explosive. It is less sensitive to mechanical shock than ].


==Preparation== ==Preparation==
Barium azide may be prepared by reacting ] with a soluble barium salt:<ref name=Ull>{{cite encyclopedia |encyclopedia=Ullmann's Encyclopedia of Industrial Chemistry |publisher = Wiley-VCH |year = 2000 |isbn = 9783527306732 |doi = 10.1002/14356007.a13_193 |first1 = Horst H. |last1 = Jobelius |first2 = Hans-Dieter |last2 = Scharff |chapter = Hydrazoic Acid and Azides}}</ref>
Barium azide can be prepared by action of ] in ], ] or ]. The salt has also been synthesized with ] and nitrite: 3.5 g barium hydroxide and 200 mL aqueous hydrazine (5% w/w) were cooled and 15 g ] added dropwise with stirring. After 24 hours, excess hydroxide was removed with ]; the filtrate yield was 8g (30% yield).<ref name="HothandPyl" >{{cite journal | last1 = Hoth | first1 = W. | last2 = Pyl | first2 = G. | title = Über die Darstellung der Stickstoffwasserstoffsäure und ihrer Salze | journal = Angew. Chem. | volume = 49 | pages = p. 1742–1745 | year = 1916 | doi = 10.1002/cber.19160490234}}</ref>
:{{chem2|BaBr2 + 2 NaN3 -> Ba(N3)2 + 2NaBr}}


==Uses== ==Uses==
Can be used to make azides of magnesium (but its hydrolytic tendency frustrated efforts to isolate it), ], ], ], ] and ] with their respective sulfates.<ref name="Energetic Materials Vol.1">{{cite book Barium azide can be used to make azides of ], ], ], ], ] and ] with their respective sulfates.<ref name="Energetic Materials Vol.1">{{cite book|title=Physics and Chemistry of the Inorganic Azides|publisher=]|year=1977|isbn=9781489950093|editor1=H. D. Fair|series=Energetic Materials|volume=1|location=New York and London|editor2=R. F. Walker}}</ref>
:{{chem2|Ba(N3)2 + Li2SO4 → 2 LiN3 + BaSO4}}
|author= H. D. Fair and R. F. Walker
|title=Energetic Materials, Vol. 1. Physics and Chemistry of the Inorganic Azides.
|publisher=Plenum Press
|location=New York and London
|year=1977
|pages=
|isbn=
|oclc=
|doi=10.1002/prac.19770811124
|accessdate=
}}</ref>


It can also be used as a source for high purity nitrogen by heating:
:Ba(N3</sub>)<sub>2</sub> + Li<sub>2</sub>SO<sub>4</sub> → 2 LiN<sub>3</sub> + BaSO<sub>4</sub>
:{{chem2|Ba(N3)2 → Ba + 3 N2}}

This reaction liberates metallic barium, which is used as a ] in vacuum applications.

==See also==
* ]
* ]
* ]


==References== ==References==
{{reflist}} {{reflist}}

{{Barium compounds}}
{{Azides}}


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