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Federal
Substance Identification Information from EPA's Substance Registry
U.S. Environmental Protection Agency —
The Substance Registry Services (SRS) is the authoritative resource for basic information about substances of interest to the U.S. EPA and its state and tribal... -
Federal
Drug Reference Vocabulary - Multum License Agreement
U.S. Department of Health & Human Services —
License for the Drug Abuse Warning Network\'s Drug Reference Vocabulary (DRV), a classification system for the substances collected by DAWN that is based on the...