Official EU label nameGlossary entry 26849

SODIUM OCTOXYNOL-2 ETHANE SULFONATE

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:2917-94-455837-16-667923-87-9

EC:220-851-3267-791-4

Ingredient index records:

SODIUM OCTOXYNOL-2 ETHANE SULFONATE

Cosmetic functions: CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Sodium 2-[2-[2-[4-(1,1,3,3-tetramethylbutyl)phenoxy]ethoxy]ethoxy]ethanesulphonate

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2 matched or reported names

SODIUM OCTOXYNOL-2 ETHANE SULFONATEentsufon

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name SODIUM OCTOXYNOL-2 ETHANE SULFONATE.

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 2917-94-4

CAS 2917-94-4PubChem CID 23691009

Entsufon Sodium

The Panel also concluded that ... Sodium Octoxynol-2 Ethane Sulfonate is safe as used in rinse-off cosmetic products and safe at concentrations of 5% in leave-on cosmetic products. — Cosmetic Ingredient Review (CIR)

IUPAC name: sodium 2-[2-[2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethoxy]ethoxy]ethanesulfonate

Molecular formula: C20H33NaO6S
Molecular weight: 424.5 g/mol
Exact mass: 424.18955422 Da
Topological polar surface area: 93.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 6
Covalent units: 2
Defined stereocentres: 0

Also known as

Sodium octoxynol-2 ethane sulfonateEntsufon sodium [USAN]Triton X-200UNII-L6867H5FR4L6867H5FR4Entsufon sodium (USAN)EINECS 220-851-3ENTSUFON SODIUM [II]

16 more reported names

ENTSUFON SODIUM [VANDF]ENTSUFON SODIUM [MART.]TRITON X-200 [II]ENTSUFON SODIUM [WHO-DD]TRITON X-200 SURFACTANTSODIUM OCTOXYNOL-2 ETHANE SULPHONATE2-(2-(2-(4-(1,1,3,3-Tetramethylbutyl)phenoxy)ethoxy)ethoxy)ethanesulfonic acid, sodium saltSodium 2-(2-(2-(4-(1,1,3,3-tetramethylbutyl)phenoxy)ethoxy)ethoxy)ethanesulfonateSodium 2-[2-[2-[4-(1,1,3,3-tetramethylbutyl)phenoxy]ethoxy]ethoxy]ethanesulfonateENTSUFON SODIUM (II)Ethanesulfonic acid, 2-(2-(2-(4-(1,1,3,3-tetramethylbutyl)phenoxy)ethoxy)ethoxy)-, sodium saltSODIUM OCTOXYNOL-2 ETHANE SULFONATE [VANDF]ENTSUFON SODIUM (MART.)TRITON X-200 (II)2-(2-(2-(Octylphenoxy)ethoxy)ethoxy)ethanesulfonic acid, sodium saltEthanesulfonic acid, 2-[2-[2-[4-(1,1,3,3-tetramethylbutyl)phenoxy]ethoxy]ethoxy]-, sodium salt

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External database identifiers

ChEMBL:CHEMBL2106682
EPA DTXSID:DTXSID3042398

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

PubChem 2D chemical structure for CAS 55837-16-6

CAS 55837-16-6PubChem CID 18018

Entsufon

Entsufon is a small molecule drug. Entsufon has a monoisotopic molecular weight of 402.21 Da. — DrugBank

IUPAC name: 2-[2-[2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethoxy]ethoxy]ethanesulfonic acid

Molecular formula: C20H34O6S
Molecular weight: 402.5 g/mol
Exact mass: 402.20760997 Da
XLogP3: 3.9
Topological polar surface area: 90.4 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 6
Covalent units: 1
Defined stereocentres: 0

Also known as

Entsufon [INN]4HI65O1DUA2-(2-(2-(4-(2,4,4-Trimethylpentan-2-yl)phenoxy)ethoxy)ethoxy)ethane-1-sulfonic acid2-(2-{2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethoxy}ethoxy)ethane-1-sulfonic acidUNII-4HI65O1DUAENTSUFON [II]ENTSUFON [VANDF]ENTSUFON [WHO-DD]

1 more reported name

ETHANESULFONIC ACID, 2-(2-(2-(4-(1,1,3,3-TETRAMETHYLBUTYL)PHENOXY)ETHOXY)ETHOXY)-

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External database identifiers

ChEMBL:CHEMBL2110927
EPA DTXSID:DTXSID70204432

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

PubChem 2D chemical structure for CAS 67923-87-9

CAS 67923-87-9PubChem CID 23673608

Ethanesulfonic acid, 2-(2-(2-(octylphenoxy)ethoxy)ethoxy)-, sodium salt

IUPAC name: sodium 2-[2-[2-(2-octylphenoxy)ethoxy]ethoxy]ethanesulfonate

Molecular formula: C20H33NaO6S
Molecular weight: 424.5 g/mol
Exact mass: 424.18955422 Da
Topological polar surface area: 93.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 6
Covalent units: 2
Defined stereocentres: 0

Also known as

sodium;2-[2-[2-(2-octylphenoxy)ethoxy]ethoxy]ethanesulfonateEthanesulfonic acid, 2-[2-[2-(octylphenoxy)ethoxy]ethoxy]-, sodium saltEINECS 267-791-4HRRWKHBHFYQOKW-UHFFFAOYSA-MEthanesulfonic acid, 2-(2-(2-(octylphenoxy)ethoxy)ethoxy)-, sodium salt (1:1)Sodium 2-(2-(2-(octylphenoxy)ethoxy)ethoxy)ethanesulphonateSodium 2-{2-[2-(2-octylphenoxy)ethoxy]ethoxy}ethane-1-sulfonate

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External database identifiers

EPA DTXSID:DTXSID20987304

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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