Is XYMENYNIC ACID safe to use in EU cosmetics?

XYMENYNIC ACID 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.

What other records share CAS 557-58-4?

CAS 557-58-4 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.

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InventoryRef 6020515/10/2010

XYMENYNIC ACID

11-Octadecen-9-ynoic acid, (E)-

XYMENYNIC ACID 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 557-58-4

CAS 557-58-4PubChem CID 5312688

Ximenynic acid

Ximenynic acid is a long-chain fatty acid. — ChEBI

IUPAC name: (E)-octadec-11-en-9-ynoic acid

Molecular formula: C18H30O2
Molecular weight: 278.4 g/mol
Exact mass: 278.224580195 Da
XLogP3: 6.6
Topological polar surface area: 37.3 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Ximeninic acidSantalbic acidXymenynic acidtrans-11-Octadecen-9-ynoic acid11E-octadecen-9-ynoic acidIA0Z48P13WHYDROR ILNSC-252625

16 more reported names

RefChem:195361209-179-111-octadecen-9-ynoic acid11-Octadecen-9-ynoic acid, (E)-(11E)-octadec-11-en-9-ynoic acidUNII-IA0Z48P13WAgonandoic acidEINECS 209-179-1NSC 252625Ximeninic acid, AldrichCPRXYMENYNIC ACID [WHO-DD]CHEBI:165495VENIIVIRETXKSV-BQYQJAHWSA-Ntrans-11-octa-decen-9-ynoic acid11-Octadecen-9-ynoic acid, (11E)-Acetylenic acids; 11-Octadecen-9-ynoic acid, (E)-; Santalbic acid; trans-11-Octadecen-9-ynoic acid; Ximeninic acid; Agonandoic acid

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:165495
ChEMBL:CHEMBL1967321
EPA DTXSID:DTXSID501317249

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 XYMENYNIC ACID

INCI name

XYMENYNIC ACID

Description

11-Octadecen-9-ynoic acid, (E)-

Record provenance

Inventory reference: 60205
Imported identity: XYMENYNIC ACID
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for XYMENYNIC ACID

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Key data

CAS

557-58-4

209-179-1

Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.
SKIN CONDITIONING - EMOLLIENT: Acting as lubricants on the skin surface providing the skin with a soft and smooth appearance.

Official EU ingredient-name evidence

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

#30188 · XYMENYNIC ACID

Ingredients with overlapping formulation functions

XIMENIA AMERICANA SEED OIL PEG-8 ESTERSSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

XIMENIA AMERICANA SEED OIL POLYGLYCERYL-6 ESTERSSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

XIMENIA PERRIERI SEED OILSKIN CONDITIONING - EMOLLIENT

XYLITYL COCOATEEMULSION STABILISING, HUMECTANT, PLASTICISER, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SUR…

YARROWIA LIPOLYTICA OILSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ZEA MAYS GERM OILSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ZEA MAYS GLUTEN PROTEINBINDING, BULKING, HAIR CONDITIONING, HUMECTANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ZEA MAYS OIL UNSAPONIFIABLESHAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

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 XYMENYNIC ACID appears in the CosIng inventory

The CosIng inventory lists XYMENYNIC ACID 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.

XYMENYNIC ACID 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

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

CAS 557-58-4 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 XYMENYNIC ACID

This page reproduces the CosIng inventory entry for XYMENYNIC ACID 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 XYMENYNIC 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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