Back Ammonium Afrikaans أمونيوم Arabic آمونیوم AZB Амоній Byelorussian Амоний Bulgarian অ্যামোনিয়াম Bengali/Bangla Amonij BS Amoni Catalan Amonný kation Czech Ammoniumion Danish
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| Names | |||
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| IUPAC name
Ammonium ion
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| Systematic IUPAC name
Azanium[1] | |||
| Identifiers | |||
3D model (JSmol)
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| ChEBI | |||
| ChemSpider | |||
| MeSH | D000644 | ||
PubChem CID
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| UNII | |||
CompTox Dashboard (EPA)
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| Properties | |||
| [NH4]+ | |||
| Molar mass | 18.039 g·mol−1 | ||
| Acidity (pKa) | 9.25 | ||
| Conjugate base | Ammonia | ||
| Structure | |||
| Tetrahedral | |||
| Related compounds | |||
Other cations
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Related compounds
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Ammonium radical •NH4 | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The ammonium cation is a positively charged polyatomic ion with the chemical formula NH+4 or [NH4]+. It is formed by the protonation of ammonia (NH3). Ammonium is also a general name for positively charged (protonated) substituted amines and quaternary ammonium cations ([NR4]+), where one or more hydrogen atoms are replaced by organic or other groups (indicated by R). Not only is ammonium a source of nitrogen and a key metabolite for many living organisms, but it is an integral part of the global nitrogen cycle.[2] As such, the human impact in recent years could have an effect on the biological communities that depend on it.
- ^ International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. pp. 71,105,314. Electronic version.
- ^ Schlesinger, William H.; Bernhardt, Emily S. (2020-01-01), Schlesinger, William H.; Bernhardt, Emily S. (eds.), "Chapter 12 - The Global Cycles of Nitrogen, Phosphorus and Potassium", Biogeochemistry (Fourth Edition), Academic Press, pp. 483–508, doi:10.1016/b978-0-12-814608-8.00012-8, ISBN 978-0-12-814608-8, retrieved 2024-03-08