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Descriptor English: Onium Compounds
Descriptor Spanish: Compuestos Onio
Descriptor Portuguese: Oniocompostos
Descriptor French: Composés onium
Entry term(s): Compounds, Onium
Tree number(s): D02.675
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D009861
Scope note: Ions with the suffix -onium, indicating cations with coordination number 4 of the type RxA+ which are analogous to QUATERNARY AMMONIUM COMPOUNDS (H4N+). Ions include phosphonium R4P+, oxonium R3O+, sulfonium R3S+, chloronium R2Cl+
Allowable Qualifiers: AD administration & dosage
AE adverse effects
AG agonists
AI antagonists & inhibitors
AN analysis
BL blood
CF cerebrospinal fluid
CH chemistry
CL classification
CS chemical synthesis
EC economics
HI history
IM immunology
IP isolation & purification
ME metabolism
PD pharmacology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
UR urine
Public MeSH Note: 68
History Note: 68
Entry Version: ONIUM CPDS
DeCS ID: 10044
Unique ID: D009861
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1968/01/01
Date of Entry: 1999/01/01
Revision Date: 2005/07/01
Onium Compounds - Preferred
Concept UI M0015303
Scope note Ions with the suffix -onium, indicating cations with coordination number 4 of the type RxA+ which are analogous to QUATERNARY AMMONIUM COMPOUNDS (H4N+). Ions include phosphonium R4P+, oxonium R3O+, sulfonium R3S+, chloronium R2Cl+
Preferred term Onium Compounds
Entry term(s) Compounds, Onium



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