What does the restriction note for UNDECYLENIC ACID mean?

The restriction field for UNDECYLENIC ACID 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 UNDECYLENIC ACID serve in cosmetics?

According to the EU CosIng inventory, UNDECYLENIC ACID carries the following function designation(s): ANTIMICROBIAL, FRAGRANCE, PRESERVATIVE, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING.

What other records share CAS 112-38-9?

CAS 112-38-9 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 UNDECYLENIC ACID?

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 3882910/08/2020

UNDECYLENIC ACID

Undec-10-enoic acid; 10-Undecenoic acid

UNDECYLENIC ACID 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	Evidence linked Permitted list with conditions Open this evidence	1	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	Evidence linked Permitted list with conditions Open this evidence	1	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	Evidence linked Restricted Open this evidence	1	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 112-38-9

CAS 112-38-9PubChem CID 5634

Undecylenic Acid

10-undecenoic acid is an undecenoic acid having its double bond in the 10-position. It is derived from castor oil and is used for the treatment of skin problems. It has a role as a plant metabolite and an antifungal drug. It is a conjugate acid of a 10-undecenoate. — ChEBI

IUPAC name: undec-10-enoic acid

Molecular formula: C11H20O2
Molecular weight: 184.27 g/mol
Exact mass: 184.146329876 Da
XLogP3: 3.9
Topological polar surface area: 37.3 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

10-UNDECENOIC ACID10-Hendecenoic acidRenselinDeclidSevinon10-Undecylenic acidundecylenateFEMA No. 3247

16 more reported names

Kyselina undecylenovaUNDECEN-10-ACID-1omega-undecenoic acidomega-hendecenoic acidNSC-2013K3D86KJ24NCHEBI:35045NSC2013DesinexMicocilenSanafitilTobcharmAntifungal PenHongo KillerRemedy NailsSally Hansen

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:35045
ChEMBL:CHEMBL1276010
EPA DTXSID:DTXSID8035001
PubMed:26902505
PubMed:26776224
PubMed:22947450
PubMed:22907042
PubMed:22904206
PubMed:22717557
PubMed:22713167
PubMed:22704888
PubMed:22652355
PubMed:22447430
PubMed:22433058
PubMed:22396902

Evidence from additional scientific databases

NIH PubChem PUG-View

Exact identifier match5634

Attributed physical-property, hazard, environmental and use annotations.

Boiling Point: Decomposes at 275°C Source: DrugBank
Boiling Point: 137.00 °C. @ 2.00 mm Hg Source: Human Metabolome Database (HMDB)
Boiling Point: 275 °C Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Density: 0.910 - 0.917 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

LogP: 3.86 Source: Human Metabolome Database (HMDB)

Melting Point: 24.5 Source: DrugBank
Melting Point: 24.5 °C Source: Human Metabolome Database (HMDB)

Physical Description: Liquid Source: EPA Chemical Data Reporting (CDR)
Physical Description: Liquid or solid; mp = 24.5 deg C; [Merck Index] Colorless or white liquid or low-melting solid; mp = 25-27 deg C; [Alfa Aesar MSDS] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Physical Description: Solid Source: Human Metabolome Database (HMDB)
Physical Description: colourless to pale yellow liquid Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Refractive Index: 1.446-1.453 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Solubility: Insoluble Source: DrugBank
Solubility: 0.0737 mg/mL at 30 °C Source: Human Metabolome Database (HMDB)
Solubility: insoluble in water; soluble in alcohol and ether Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
Solubility: (in ethanol) Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Carcinogen Classification: No indication of carcinogenicity to humans (not listed by IARC). Source: Toxin and Toxin Target Database (T3DB)

Signal: Warning Source: European Chemicals Agency (ECHA)
GHS Hazard Statements: H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]; H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H400 (10.5%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H412 (96.2%): Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
Precautionary Statement Codes: P264, P264+P265, P273, P280, P302+P352, P305+P351+P338, P321, P332+P317, P337+P317, P362+P364, P391, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
ECHA C&L Notifications Summary: Aggregated GHS information provided per 1915 reports by companies from 16 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)

Cosmetic Ingredient Review Conclusion: 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...Undecylenic Acid... Source: Cosmetic Ingredient Review (CIR)
Cosmetic Ingredient Review Finding(s): Safe for use in cosmetics, with qualifications Source: Cosmetic Ingredient Review (CIR)

Industry Uses: Intermediate Source: EPA Chemical Data Reporting (CDR)

Cosmetic Ingredient Review Link: CIR ingredient: Undecylenic Acid Source: Cosmetic Ingredient Review (CIR)
Sources/Uses: Used as a topical antifungal agent; [Merck Index] Used as a flavoring agent for foods; [JECFA] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status

Source	Result	Checked
NIH PubChem PUG-View	Exact match	2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

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

Inventory details for UNDECYLENIC ACID

INCI name

UNDECYLENIC ACID

INN name

undecylenic acid

Ph. Eur. name

acidum undecylenicum

Description

Undec-10-enoic acid; 10-Undecenoic acid

Record provenance

Inventory reference: 38829
Imported identity: UNDECYLENIC ACID
Source update: 10/08/2020

European Commission CosIng source notes

Annex records for UNDECYLENIC ACID

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

112-38-9

203-965-8

Restriction

V/18

Function

ANTIMICROBIAL: Preventing and/or slowing down microbial growth.
FRAGRANCE: Imparting an odour or taste. Creating a perceivable pleasant smell and/or masking a bad smell.
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.

#29668 · UNDECYLENIC ACID

The 5 markets that hold a rule for this substance do not classify it the same way.

restricted: South Korea
permitted on a positive list: European Union Great Britain New Zealand ASEAN

See every substance the markets disagree about

Ingredients with overlapping formulation functions

TRICLOCARBANANTIMICROBIAL, DEODORANT, PRESERVATIVE

TRICLOSANANTIMICROBIAL, DEODORANT, PRESERVATIVE

TRIFERRIC AQUA HYDROXY OXO BIS-TRIMESATEPRESERVATIVE

TRIS(N-HYDROXYETHYL)HEXAHYDROTRIAZINEPRESERVATIVE

UNDECYLENOYL SARCOSINEANTI-SEBORRHEIC, ANTI-SEBUM, PRESERVATIVE

XYLITYL CAPRATE/CAPRYLATEANTIMICROBIAL, EMULSION STABILISING, HUMECTANT, PRESERVATIVE, SKIN CONDITIONING

ZINC PYRITHIONEANTI-SEBORRHEIC, ANTI-SEBUM, HAIR CONDITIONING, PRESERVATIVE

ZIRCONIUM OXIDE ACETATE TRIMESICATEABSORBENT; PRESERVATIVE

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 UNDECYLENIC ACID appears in the CosIng inventory

The CosIng inventory lists UNDECYLENIC ACID 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.

UNDECYLENIC ACID is also tagged with 5 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

UNDECYLENIC ACID 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 UNDECYLENIC ACID 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, UNDECYLENIC ACID carries the following function designation(s):

CAS 112-38-9 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.

View CAS records

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 UNDECYLENIC ACID

This page combines the CosIng inventory entry for UNDECYLENIC ACID 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 UNDECYLENIC ACID 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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Find other inventory ingredients and annex entries related to UNDECYLENIC ACID, its identifiers or nearby name variants.

Regulatory evidence by market

Chemical identity and properties

Undecylenic Acid

Evidence from additional scientific databases

NIH PubChem PUG-View

Boiling Point 3

Density 1

LogP 1

Melting Point 2

Physical Description 4

Refractive Index 1

Solubility 4

Carcinogen Classification 1

GHS Classification 4

Toxicity Summary 2

Industry Uses 1

Uses 2