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CodeSystem: Unique Ingredient Identifier (UNII)

Official URL: http://fdasis.nlm.nih.gov				Version: 1.0.0
Active as of 2022-08-23			Responsible: U.S. Food and Drug Administration (FDA)	Computable Name: UNII
Other Identifiers: id: Uniform Resource Identifier (URI)#urn:oid:2.16.840.1.113883.4.9
Copyright/Legal: Unless otherwise noted, the contents of the FDA website (www.fda.gov) — both text and graphics — are not copyrighted. They are in the public domain and may be republished, reprinted and otherwise used freely by anyone without the need to obtain permission from FDA. Credit to the U.S. Food and Drug Administration as the source is appreciated but not required.

A UNII is a non-proprietary, free, unique, unambiguous, nonsemantic, alphanumeric identifier based on a substance’s molecular structure and/or descriptive information. UNII identifiers are generated based on scientific identity characteristics using ISO 11238 data elements. UNII availability does not imply any regulatory review or approval. Synonyms and mappings are based on the best public information available at the time of publication.

This Code system is referenced in the content logical definition of the following value sets:

• This CodeSystem is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)