XYMENYNIC ACID
Emollient
Good
CAS Number: 557-58-4
About XYMENYNIC ACID
A rare acetylenic fatty acid from sandalwood seeds — used as an emollient and skin conditioner with unique anti-inflammatory potential.
Detailed Analysis
Xymenynic acid (trans-11-octadecen-9-ynoic acid, CAS 557-58-4) is an unusual acetylenic (triple bond) fatty acid found in sandalwood (Ximenia, Santalum) seed oils. Its unique conjugated enyne structure gives it distinctive biological properties including reported anti-inflammatory activity. It functions as an emollient and skin conditioner. Limited cosmetic safety data exists, but its long traditional use in sandalwood oils and absence of GHS hazards suggest a moderate safety profile.
What It Does
Skin Benefits
- ✓ Unique emollient properties
- ✓ Potential anti-inflammatory activity
- ✓ Skin conditioning from sandalwood oil heritage
Known Concerns
- ⚠ Very limited cosmetic safety data
- ⚠ Acetylenic fatty acids may have higher reactivity than standard fatty acids
- ⚠ Rare ingredient — limited manufacturing history
Safety Score
Good
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
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Download LuxSenseThis information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.