Ammonium
IUPAC name	Ammonium ion
Systematic name Azanium
Identifiers
CAS number	14798-03-9
PubChem	16741146
MeSH	D000644
ChEBI	CHEBI:28938
SMILES	[NH4+]
InChI InChI=1/H3N/h1H3/p+1
Properties
Molecular formula	H4N
Molar mass	18.04 g mol-1
Acidity (pKa)	9.25
Structure
Molecular shape	Tetrahedral
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

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. view more...