Is TRIDECETH-15 safe to use in EU cosmetics?

TRIDECETH-15 is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

How do I check if my formula contains TRIDECETH-15?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 8031715/10/2010

TRIDECETH-15

Poly(oxy-1,2-ethanediyl), .alpha.-tridecyl-.omega.-hydroxy

TRIDECETH-15 is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 24938-91-8

CAS 24938-91-8PubChem CID 38049

Tridecyl ethyleneglycol monoether

IUPAC name: 2-tridecoxyethanol

Molecular formula: C15H32O2
Molecular weight: 244.41 g/mol
Exact mass: 244.240230259 Da
XLogP3: 5.7
Topological polar surface area: 29.5 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

2-(Tridecyloxy)ethanolEthanol, 2-(tridecyloxy)-36KKG1IWMUETHYLENE GLYCOL MONOTRIDECYL ETHERTRIDECETH-1EINECS 253-962-0NOVEL TDA 1RefChem:899417

9 more reported names

253-962-02-(Tridecyloxy)ethan-1-olPOE (10) Tridecyl alcohol2-n-tridecyloxyethanolUNII-36KKG1IWMUtridecyl glycol2-(1-tridecyloxy)-1-ethanolPolyoxyethylene 10 tridecyl etherPoly(ethylene glycol) (18) tridecyl ether

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID40860327
PubMed:25398874

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for TRIDECETH-15

INCI name

TRIDECETH-15

Description

Poly(oxy-1,2-ethanediyl), .alpha.-tridecyl-.omega.-hydroxy

Record provenance

Inventory reference: 80317
Imported identity: TRIDECETH-15
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for TRIDECETH-15

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Key data

CAS

24938-91-8 (Generic)

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Restriction

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Function

SURFACTANT - CLEANSING: Wetting body surfaces, emulsifying or solubilizing oils, and suspending soil (generally, such ingredients contribute to the foaming and lathering properties of cleansing products).
SURFACTANT - EMULSIFYING: Helping suspensions or dispersions of liquids in a second liquid by reducing the surface tension of the substances to be emulsified.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#29110 · TRIDECETH-15

Records sharing a CAS or EC identity

TRIDECETH-11 TRIDECETH-18 TRIDECETH-20 TRIDECETH-21 TRIDECETH-50

Ingredients with overlapping formulation functions

TRICHILIA EMETICA SEED OIL PEG-8 ESTERSSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TRICHILIA EMETICA SEED OIL POLYGLYCERYL-6 ESTERSSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TRIDECETH-10 PHOSPHATECLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TRIDECETH-12SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TRIDECETH-15 CARBOXYLIC ACIDSURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TRIDECETH-18SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TRIDECETH-2SURFACTANT - EMULSIFYING

TRIDECETH-20CLEANSING, SURFACTANT - EMULSIFYING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox 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

How TRIDECETH-15 appears in the CosIng inventory

The CosIng inventory lists TRIDECETH-15 as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

TRIDECETH-15 is also tagged with 2 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

TRIDECETH-15 is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, TRIDECETH-15 carries the following function designation(s):

CAS 24938-91-8 (Generic) may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.

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Source note for TRIDECETH-15

This page reproduces the CosIng inventory entry for TRIDECETH-15 from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research TRIDECETH-15 and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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