FDA Unique Ingredient Identifiers (UNIIs)
Description
FDA’s Global Substance Registration System enables efficient and accurate exchange of information on substances through their Unique Ingredient Identifiers (UNIIs) which can be generated at any time in the regulatory life cycle.
Note
UNIIs 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. Please report any problems/errors associated with this data to FDA-SRS@fda.hhs.gov.
Source links
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API
Licensing
Update frequency
Monthly-ish - kind of every 2-3 months sometimes
