Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate
antioxidant stabilizer for protecting plastics and polymers from light-induced free radicals
Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (abbreviated BTMPS) is a hindered amine light stabilizer used to protect plastics and coatings such as paint from oxidation caused by sunlight weathering. Like most compounds of this class, the activated form is an aminoxyl radical.
Synthesis
It is produced by the diesterification of sebacic acid (decanedioic acid) with 4-hydroxy-TEMPO.
Public health and medical concerns
In 2024, it was detected as an adulterant in illicitly sold fentanyl in the United States.
It is capable of inhibiting nicotinic acetylcholine receptors. Additionally, it is a potent blocker of L-type calcium channels. It is also able to induce dose-dependent hemodynamic alterations. Similar to early calcium channel blockers, it can precipitate adrenergic release.
See also
Antioxidant
Photolysis (photodegradation)
Radical (chemistry)
References
External links
"Weird chemical used in plastics has erupted as latest fentanyl adulterant". Ars Technica. 2025-07-10.
The public source identifies “Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate” as antioxidant stabilizer for protecting plastics and polymers from light-induced free radicals. This brief keeps that definition visible, then builds a research path around 6-tetramethyl-4-piperidyl, sebacate and antioxidant.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate”, the useful work is to connect “antioxidant stabilizer for protecting plastics and polymers from light-induced free radicals” to the records capable of establishing context and consequence.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jan 31, 2026. The linked authority identifier is Q15632726. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2024 and 2025.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate”, its source revision and the description used here.
- Expand the search: follow Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate primary sources, Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate archive and 6-tetramethyl-4-piperidyl research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate”?
- Which institution is responsible for the underlying evidence?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.