Ammonium nitrate

Ammonium nitrate is a chemical compoond, the nitrate saut o the ammonium cation. It haes the chemical formula NH4NO3, simplified to N2H4O3. It is a white crystal solit an is heichly soluble in watter. It is predominantly uised in agricultur as a heich-nitrogen fertilizer.[4] Its ither major uise is as a component o explosive mixtures uised in minin, quarryin, an ceevil construction. It is the major constituent o ANFO, a popular industrial explosive which accoonts for 80% o explosives uised in North Americae; seemilar formulations hae been uised in improvised explosive devices. Mony kintras are phasin oot its uise in consumer applications due tae concerns ower its potential for misuise.

Ammonium nitrate
Structural formula
Ammonium nitrate crystal structur
Sample o white pouder
IUPAC name
Ammonium nitrate
3D model (JSmol)
RTECS nummer BR9050000
UN nummer 0222wi > 0.2% combustible substances
1942wi <= 0.2% combustible substances
Molar mass 80.043 g/mol
Appearance white/grey solid
Density 1.725 g/cm3 (20 °C)
Meltin pynt 169.6 °C (337.3 °F; 442.8 K)
Bylin pynt approx. 210 °C;decomposes
118 g/100 ml (0 °C)
150 g/100 ml (20 °C)
297 g/100 ml (40 °C)
410 g/100 ml (60 °C)
576 g/100 ml (80 °C)
1024 g/100 ml (100 °C)[1]
Magnetic susceptibility -33.6·10−6 cm3/mol
Explosive data
Shock sensitivity very law
Friction sensitivity very law
Detonation velocity 5270 m/s
Main hazards Explosive
Safety data sheet ICSC 0216
EU clessification Explosive E (E)
NFPA 704
Lethal dose or concentration (LD, LC):
2085–5300 mg/kg (oral in rats, mice)[2]
Relatit compoonds
Ither anions
Ammonium nitrite
Ither cations
Sodium nitrate
Potassium nitrate
Hydroxylammonium nitrate
Relatit compoonds
Ammonium perchlorate
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
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Infobox references


  1. Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
  2. Martel, B.; Cassidy, K. (2004). Chemical Risk Analysis: A Practical Handbook. Butterworth–Heinemann. p. 362. ISBN 1-903996-65-1.
  3. Archived 2016-01-26 at the Wayback Machine
  4. Karl-Heinz Zapp "Ammonium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry 2012, Wiley-VCH, Weinheim. doi:10.1002/14356007.a02_243