Official EU label nameGlossary entry 13189

HYDROXY TETRAMETHYLPIPERIDINE OXIDE

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

0 markets with evidence

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Markets with evidence

Evidence gaps

Resolved identifiers

Resolved substance identity

CAS:2226-96-2

EC:218-760-9

Ingredient index records:

HYDROXY TETRAMETHYLPIPERIDINE OXIDE

Cosmetic functions: ANTIOXIDANT

1-Oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine; 1-Piperidinyloxy, 4-hydroxy-2,2,6,6-tetramethyl-; 1-λ1-Oxidanyl-2,2,6,6-tetramethylpiperidin-4-ol 2,2,6,6-tetramethylpiperidine-1,4-diol; 4-Hydroxy-2,2,6,6-tetramethyl-piperidinooxy; 4-Hydroxy-2,2,6,6-tetramethylpiperidine 1-Oxyl Free Radical; 4-Hydro…

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1 matched or reported name

HYDROXY TETRAMETHYLPIPERIDINE OXIDE

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name HYDROXY TETRAMETHYLPIPERIDINE OXIDE.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 2226-96-2

CAS 2226-96-2PubChem CID 137994

Tempol

Tempol has been used in trials studying the treatment of Anal Cancer. — DrugBank

Molecular formula: C9H18NO2
Molecular weight: 172.24 g/mol
Exact mass: 172.133753817 Da
XLogP3: 0.9
Topological polar surface area: 24.5 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Tanol4-OxypiperidolTMPNHyTEMPONitroxyl 21-Piperidinyloxy, 4-hydroxy-2,2,6,6-tetramethyl-4-Hydroxy-2,2,6,6-tetramethylpiperidine 1-oxylMBM-02

16 more reported names

U78ZX2F65XSPJ-7012,2,6,6-Tetramethyl-4-hydroxypiperidinooxy2,2,6,6-Tetramethyl-4-piperidinol 1-oxyl2,2,6,6-Tetramethyl-4-piperidinol-N-oxyl4-Hydroxy-2,2,6,6-tetramethylpiperidinooxy4-Hydroxy-2,2,6,6-tetramethylpiperidinooxylZJ-7014-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxylNSC-1427842,2,6,6-Tetramethyl-4-hydroxypiperidinooxy radical4-Hydroxy-2,2,6,6-tetramethylpiperidin-1-yl)oxidanyl(4-hydroxy-2,2,6,6-tetramethylpiperidin-1-yl)oxidanylPIPERIDINOOXY, 4-HYDROXY-2,2,6,6-TETRAMETHYL-2,2,6,6-Tetramethyl-4-piperidinol N-oxyl2,2,6,6-Tetramethyl-4-piperidinol-1-oxy

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External database identifiers

ChEBI:CHEBI:180664
ChEMBL:CHEMBL607023
EPA DTXSID:DTXSID4041280
PubMed:38454815
PubMed:36513130
PubMed:32726580
PubMed:31054354
PubMed:30346588
PubMed:29609002
PubMed:28633109
PubMed:28039404
PubMed:27128347
PubMed:26177467
PubMed:25817889
PubMed:25787151

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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