What does the restriction note for SODIUM UNDECYLENATE mean?

The restriction field for SODIUM UNDECYLENATE reads: V/18. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

What function does SODIUM UNDECYLENATE serve in cosmetics?

According to the EU CosIng inventory, SODIUM UNDECYLENATE carries the following function designation(s): PRESERVATIVE, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING.

What other records share CAS 3398-33-2?

CAS 3398-33-2 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains SODIUM UNDECYLENATE?

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 3811610/08/2020

SODIUM UNDECYLENATE

Sodium undec-10-enoate

SODIUM UNDECYLENATE is linked to 1 EU annex record on this page. Inventory note: V/18.

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Regulatory evidence by market

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Market	Evidence status	Records	Source language
European Union	Evidence linked Positive-list entry with conditions Open this evidence	1	English and EU languages
Great Britain	Source mapped Official source mapped; ingredient rule not imported	0	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Evidence linked Permitted list with conditions Open this evidence	1	English
ASEAN	Source mapped Official source mapped; ingredient rule not imported	0	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Source mapped Official source mapped; ingredient rule not imported	0	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Source mapped Official source mapped; ingredient rule not imported	0	Portuguese with INCI crosswalks
India	Source mapped Official source mapped; ingredient rule not imported	0	English and Hindi
Saudi Arabia	Source mapped Official source mapped; ingredient rule not imported	0	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 3398-33-2

CAS 3398-33-2PubChem CID 23667258

Sodium Undecylenate

The CIR Expert Panel concluded that the following ingredients are safe in the present practices of use andconcentration described in the safety assessment when formulated to be non-irritating and non-sensitizing, which may be basedon a QRA...Sodium Undecylenate... — Cosmetic Ingredient Review (CIR)

IUPAC name: sodium undec-10-enoate

Molecular formula: C11H19NaO2
Molecular weight: 206.26 g/mol
Exact mass: 206.12827413 Da
Topological polar surface area: 40.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 2
Defined stereocentres: 0

Also known as

Undecylenic Acid Sodium Salt10-Undecenoic acid, sodium saltUNII-V50TG7E11WV50TG7E11WSODIUM UNDECYLENATE [VANDF]EINECS 222-264-8SODIUM UNDECYLENATE [WHO-DD]10-Undecenoic, sodium salt

16 more reported names

AI3-1972110-Hendecenoic acid, sodium saltSODIUM UNDECYLENATE [INCI]NSC 2836NSC-2836Sodium undec10enoateRefChem:18415010Undecenoic, sodium salt682-768-2sodium;undec-10-enoateSodium 10-undecenoateSODIUM DERIVATIVE OF 10-UNDECENOATESodium undecylenate, AldrichCPRNSC2836HY-W12745210-Undecenoic acid, sodium salt (1:1)

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID4037039

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 SODIUM UNDECYLENATE

INCI name

SODIUM UNDECYLENATE

Description

Sodium undec-10-enoate

Record provenance

Inventory reference: 38116
Imported identity: SODIUM UNDECYLENATE
Source update: 10/08/2020

European Commission CosIng source notes

Annex records for SODIUM UNDECYLENATE

Annex V Restriction reference

Entry 18

UNDECYLENIC ACID / POTASSIUM UNDECYLENATE / SODIUM UNDECYLENATE / CALCIUM UNDECYLENATE / MEA-UNDECY…

CAS: 112-38-9 / 6159-41-7 / 3398-33-2 / 1322-14-1 / 84471-25-0 / 56532-40-2

EC: 203-965-8 / - / 222-264-8 / 215-331-8 / 282-908-9 / 260-247-7

Key data

CAS

3398-33-2

222-264-8

Restriction

V/18

Function

PRESERVATIVE: Exclusively or mainly intended to inhibit the development of micro-organisms in the cosmetic product. All authorised preservatives are substances in the positive list of Annex V to the Cosmetics Regulation 1223/2009.
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.

#27089 · SODIUM UNDECYLENATE

Ingredients with overlapping formulation functions

SODIUM PYRITHIONEPRESERVATIVE

SODIUM SALICYLATEDENATURANT, PRESERVATIVE

SODIUM SORBATEPRESERVATIVE

SODIUM SULFITEANTIOXIDANT, HAIR WAVING OR STRAIGHTENING, PRESERVATIVE, REDUCING

SORBIC ACIDFRAGRANCE, PRESERVATIVE

SOYTRIMONIUM CHLORIDEANTISTATIC, HAIR CONDITIONING, PRESERVATIVE, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

SPIRAEA THUNBERGII LEAF EXTRACTANTIMICROBIAL; ANTIOXIDANT; DEODORANT; HUMECTANT; PRESERVATIVE

STEARALKONIUM CHLORIDEANTISTATIC, PRESERVATIVE, SURFACTANT - CLEANSING

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 SODIUM UNDECYLENATE appears in the CosIng inventory

The CosIng inventory lists SODIUM UNDECYLENATE as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

SODIUM UNDECYLENATE is also tagged with 3 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

SODIUM UNDECYLENATE appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for SODIUM UNDECYLENATE reads: "V/18". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, SODIUM UNDECYLENATE carries the following function designation(s):

CAS 3398-33-2 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.

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Source note for SODIUM UNDECYLENATE

This page combines the CosIng inventory entry for SODIUM UNDECYLENATE with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research SODIUM UNDECYLENATE 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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