Barium azide

Barium azide is an inorganic azide with the formula Ba(N₃)₂. Like most azides, it is explosive. It is less sensitive to mechanical shock than lead azide.

Barium azide

Names
Other names barium dinitride
Identifiers
CAS Number	18810-58-7
3D model (JSmol)	Interactive image
ChemSpider	56472
ECHA InfoCard	100.038.706
EC Number	242-594-6
PubChem CID	62728
UN number	1687
CompTox Dashboard (EPA)	DTXSID60908174
InChI InChI=1S/Ba.2N3/c;2*1-3-2/q+2;2*-1 Key: UUXFWHMUNNXFHD-UHFFFAOYSA-N
SMILES [Ba+2].[N-]=[N+]=[N-].[N-]=[N+]=[N-]
Properties
Chemical formula	BaN6
Molar mass	221.37 g/mol
Appearance	white crystalline solid
Odor	odourless
Density	2.936 g cm^−3[1]
Melting point	126 °C (259 °F; 399 K)
Boiling point	160 °C (320 °F; 433 K) (initial decomposition)[2] >217 °C (deflagrates) 180 °C(initial decomposition),[3] 225 °C explosion
Solubility in water	11.5 g/100 mL (0 °C) 14.98 g/100mL (15.7 °C) 15.36 g/100mL (20 °C) 22.73 g/100mL (52.1 °C) 24.75 g/100mL (70 °C)[4]
Solubility in alcohol	0.017 g/100 mL (16 °C)[5]
Solubility in acetone	insoluble
Solubility in ether	insoluble
Hazards
Safety data sheet
EU classification (DSD) (outdated)	Highly toxic (T+) Dangerous for the environment (N)
R-phrases (outdated)	R1, R23, R25, R36, R37, R38
Lethal dose or concentration (LD, LC):
LD50 (median dose)	mg/kg (oral, rats/mice)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Uses

Barium azide can be used to make azides of magnesium, sodium, potassium, lithium, rubidium and zinc with their respective sulfates.[4]

Ba(N₃)₂ + Li₂SO₄ → 2LiN₃ + BaSO₄

It can also be used as a source for high pure nitrogen by heating:

Ba(N₃)₂ → Ba + 3N₂

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

See also

• Hydrazoic acid

References

1. Fedoroff, Basil T.; Aaronson, Henry A.; Reese, Earl F.; Sheffield, Oliver E.; Clift, George D.; Dunkle, Cyrus G.; Walter, Hans; McLean, Dan C. (1960). Encyclopedia of Explosives and Related Items. 1. US Army Research and Development Command TACOM, ARDEC http://www.dtic.mil/get-tr-doc/pdf?AD=AD0257189. Missing or empty |title= (help)
2. Tiede, Erich (1916). "Die Zersetzung der Alkali- und Erdalkali-azide im Hochvakuum zur Reindarstellung von Stickstoff". Ber. Dtsch. Chem. Ges. (in German). 49 (2): 1742–1745. doi:10.1002/cber.19160490234.
3. Audrieth, L. F. (1934). "Hydrazoic Acid and Its Inorganic Derivatives". Chem. Rev. 15 (2): 169–224. doi:10.1021/cr60051a002.
4. H. D. Fair; R. F. Walker, eds. (1977). Physics and Chemistry of the Inorganic Azides. Energetic Materials. 1. New York and London: Plenum Press. ISBN 9781489950093.
5. Curtius, T.; Rissom, J. (1898). "Neue Untersuchungen über den Stickstoffwasserstoff N₃H". J. Prakt. Chem. (in German). 58 (1): 261–309. doi:10.1002/prac.18980580113.

Salts and covalent derivatives of the azide ion
HN3																	He
LiN3	Be(N3)2											B(N3)3	CH3N3, C(N3)4	N(N3)3,H2N—N3	O	FN3	Ne
NaN3	Mg(N3)2											Al(N3)3	Si(N3)4	P	SO2(N3)2	ClN3	Ar
KN3	Ca(N3)2	Sc(N3)3	Ti(N3)4	VO(N3)3	Cr(N3)3, CrO2(N3)2	Mn(N3)2	Fe(N3)2, Fe(N3)3	Co(N3)2, Co(N3)3	Ni(N3)2	CuN3, Cu(N3)2	Zn(N3)2	Ga(N3)3	Ge	As	Se(N3)4	BrN3	Kr
RbN3	Sr(N3)2	Y	Zr(N3)4	Nb	Mo	Tc	Ru(N3)6^3−	Rh(N3)6^3−	Pd(N3)2	AgN3	Cd(N3)2	In	Sn	Sb	Te	IN3	Xe(N3)2
CsN3	Ba(N3)2		Hf	Ta	W	Re	Os	Ir(N3)6^3−	Pt(N3)6^2−	Au(N3)4^−	Hg2(N3)2, Hg(N3)2	TlN3	Pb(N3)2	Bi(N3)3	Po	At	Rn
Fr	Ra(N3)2		Rf	Db	Sg	Bh	Hs	Mt	Ds	Rg	Cn	Nh	Fl	Mc	Lv	Ts	Og
		↓
		La	Ce(N3)3, Ce(N3)4	Pr	Nd	Pm	Sm	Eu	Gd(N3)3	Tb	Dy	Ho	Er	Tm	Yb	Lu
		Ac	Th	Pa	UO2(N3)2	Np	Pu	Am	Cm	Bk	Cf	Es	Fm	Md	No	Lr