RCSB PDB

An Information Portal to 123021 Biological Macromolecular Structures

NH4

AMMONIUM ION

NH4 is found in 171 entries

NH4 as free ligands, exist in 171 entries. Examples include 1CPD, 1D6O, 1D7H

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View summary at Ligand Expo

Chemical Component Summary
Name	AMMONIUM ION
Identifiers	ammonium azanium
Formula	H₄ N
Molecular Weight	18.04 g/mol
Type	non-polymer
Isomeric SMILES	[NH4+]
InChI	InChI=1S/H3N/h1H3/p+1
InChI Key	QGZKDVFQNNGYKY-UHFFFAOYSA-O

Chemical Details
Formal Charge	1
Atom Count	5
Chiral Atom Count	0
Chiral Atoms
Bond Count	4
Aromatic Bond Count	0

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