unit:IU
http://qudt.org/vocab/unit/IU
Types:
qudt:Unit| Predicate | Object |
|---|---|
rdf:type |
qudt:Unit |
dcterms:description |
The \(\textit{International Unit}\) (\(IU\)) is a substance-dependent reference unit of biological activity used in pharmacology. For any given substance, one \(IU\) is defined as the activity of a fixed mass of an international reference preparation (e.g. a WHO International Standard), so a conversion to mass exists but differs from one substance to another; it is therefore resolved at the level of a concrete quantity rather than stated here (hence \(conversionMultiplier = 0.0\)). For this reason the unit is dimensioned as mass (\(M\)) and modelled as a mass-equivalent, not as amount of substance (\(N\)): one \(IU\) is not a fixed number of moles. This follows the same pattern QUDT uses for other substance-dependent equivalents (e.g. mass equivalent, CO2 equivalent), where the base dimension is retained and the per-substance factor is pinned at the quantity level. |
qudt:conversionMultiplier |
0.0 |
qudt:conversionMultiplierSN |
0.0E0 |
qudt:dbpediaMatch |
http://dbpedia.org/resource/International_unit |
qudt:hasDimensionVector |
qkdv:A0E0L0I0M1H0T0D0 |
qudt:hasQuantityKind |
quantitykind:AmountOfBiologicallyActiveSubstance |
qudt:iec61360Code |
“0112/2///62720#UAB603” |
qudt:informativeReference |
|
qudt:omUnit |
http://www.ontology-of-units-of-measure.org/resource/om-2/InternationalUnit |
qudt:symbol |
“IU” |
qudt:ucumCode |
“[IU]”^^qudt:UCUMcs |
qudt:unitForQuantityKind |
quantitykind:AmountOfBiologicallyActiveSubstance |
qudt:wikidataMatch |
http://www.wikidata.org/entity/Q835916 |
rdfs:isDefinedBy |
http://qudt.org/3.5.0/vocab/unit |
rdfs:label |
|
Generated 2026-07-28T13:52:29.342+00:00