fda_substance
Search FDA substance data by name, CAS code, UNII, or molecular formula to access molecular-level ingredient information from U.S. government databases.
Instructions
Search FDA substance data — molecular-level ingredient information. Search by name, CAS code, UNII, or molecular formula.
Example searches:
'names.name:"PARACETAMOL"' — by substance name
'codes.code:"220127-57-1"' — by CAS registry number
'unii:"09211A0HHL"' — by UNII
'structure.formula:"C6H12"' — by molecular formula
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| search | No | OpenFDA search query. Examples: 'field:value', 'field:"Exact Phrase"', 'field:[20200101+TO+20231231]', '_exists_:field'. Combine with '+AND+', '+OR+', '+NOT+'. | |
| limit | No | Max results (default 10, max 100) |