Ammonium

Ammonium is an ion. It is an ammonia molecule, NH₃, protonated (with a hydrogen ion added) to make NH₄⁺. It bonds with negative ions such as chloride to make salts such as ammonium chloride. Ammonium is slightly reducing so it can react with strong oxidizing agents.

Ammonium

Names
IUPAC name Ammonium ion
Systematic IUPAC name Azanium[1]
Identifiers
CAS Number	14798-03-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:28938
ChemSpider	218
MeSH	D000644
PubChem CID	16741146
UNII	54S68520I4 Y
CompTox Dashboard (EPA)	DTXSID5043974
SMILES [NH4+]
Properties
Chemical formula	NH+ 4
Molar mass	18.04 g·mol−1
Acidity (pKa)	9.25
Conjugate base	Ammonia
Structure
Molecular shape	Tetrahedral
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references