# Schedules of Controlled Substances: Placement of Thiafentanil in Schedule II
> **Rule** · Final rule. · Published 2019-06-18 · 84 FR 28212
## Document
- **Document number:** 2019-12735
- **Category:** scheduling
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 84 FR 28212
- **Publication date:** 2019-06-18
## Abstract

On August 26, 2016, the Drug Enforcement Administration (DEA) published in the Federal Register an interim final rule with request for comments placing the substance thiafentanil, including its isomers, esters, ethers, salts and salts of isomers, esters and ethers, in schedule II of the Controlled Substances Act. This final rule adopts that interim final rule without change.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/06/18/2019-12735/schedules-of-controlled-substances-placement-of-thiafentanil-in-schedule-ii)
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