Information available for 73,538 substances.
Show examples (including wildcard searches using *).
Search Box Input
The name diazepam gives suggestions as you type to select and then
(search). DIAZEPAM is the FDA preferred substance name for this substance and the UNII is Q3JTX2Q7TU.
Using an asterisk at the end of a name allows truncation. You may retrieve salts and mixtures that start with diazepam.
Using asterisks at the front and end of the generic name may retrieve mixtures where diazepam is not at the beginning of a name.
Using asterisks at the front of a name may retrieve related names.
Using asterisks at the front and end of a biological substance name will retrieve compounds that share this data in one of their names.
UNII codes may be searched By UNII. You will be prompted with suggestions as you type. UNIIs are also present as names.
If you input a misspelling such as “valeum”, we will show you similar substance names. Just click on a name of interest to retrieve that record
We expect you to input a substance name or a UNII. If you type in a phrase such as “10% diazepam solution”, we will try to find an FDA name in this phrase, and retrieve that record.
UNII List download (updated Sep 1, 2015)
About Substance Registration System.
U.S. National Library of Medicine, 8600 Rockville Pike, Bethesda, MD 20894
National Institutes of Health, Health & Human Services
Freedom of Information Act
Last updated: Oct 2015