Compound

ammonium

Inorganic compounds that include a positively charged tetrahedral nitrogen (ammonium ion) as part of their structure. This class of compounds includes a broad variety of simple ammonium salts and derivatives.

Definition from MeSH (D064751), National Library of Medicine, read 2026-09-23. NLM revises MeSH; this copy may not reflect its current record.

CHEBI:28938ChEBI

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Structure

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A generated conformer of ammonium — one low-energy arrangement PubChem computed, not a measured structure. Hydrogens are not drawn; the formula counts them.

Class: Inorganic compound, cation
Formula: H4N
Mass: 18.039 g/mol
Charge: +1
InChIKey: QGZKDVFQNNGYKY-UHFFFAOYSA-O
SMILES: [H][N+]([H])([H])[H]
Look it up: ChEBI PubChem By InChIKey

Identity from ChEBI, geometry from PubChem. Not evidence.

Reactions

675 reactions

A common cofactor or currency species. Appears in 675 reactions — see the full list.

On the label

Labelled products

2 products

Source: NIH DSLD · Ingredient: ammonium · 2 products · Declared amount per serving: 132–164 mg (2 products)

2 labels state an amount0 do not

Order

Allergy Research GroupAmmonium Chloride BufferedAmmonium Chloride · Ammonium (Form: as Ammonium Chloride)164 mgper 1 Tablet(s)DSLD:20133
Smell Taste TechnologyAmmonium ChlorideAmmonium Chloride132 mgper 1 Tablet(s)DSLD:317281

Label record: NIH Office of Dietary Supplements · CC0

Other names

8 names

Resolves to: ammonium

Also called: [NH4](+)[NH4]+ammonium cationammonium ionAmmonium(1+)NH4(+)NH4+
Systematic name: azanium