Overview
Eicosenoic acid (CAS 5561-99-9 ), also known as cis-11-eicosenoic acid, is a long-chain monounsaturated fatty acid derived primarily from seed oils such as meadowfoam.
Its commercial value lies in its stability and film-forming characteristics, which make it a functional ingredient across lubrication, personal care, and specialty food applications.
In lubricants and metalworking fluids, it functions as a boundary lubricant additive, reducing friction and wear on metal surfaces under high-load conditions for industrial use.
Personal care formulators incorporate it into skin creams, lip products, and hair treatments where it contributes emollient and moisture-retention performance without a heavy skin feel.
As an emulsifier component, it supports stable oil-in-water and water-in-oil systems in both cosmetic and food-grade formulations for various manufacturing requirements.
In nutritional and functional food contexts, it is used as a specialty fatty acid ingredient targeting lipid profile applications and specific dietary supplement formulations.
Eicosenoic acid is typically supplied as a liquid or low-melting solid, depending on purity and temperature conditions, and is available in technical and cosmetic grades.
High-purity variants are offered for research use, with standard packaging ranging from small quantities for laboratory procurement to bulk drum supply for industrial buyers.
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Physical Properties
| Melting Point | 23.5 °C |
| Boiling Point | 419.84°C (estimate) |
| Density | 0.883 g/mL at 25 °C(lit.) |
| Flash Point | >230 °F |
| Color | White to Off-White |
| Form | Solid |
| Refractive Index | n 20/D 1.4606(lit.) |
| Log P | 8.760 (est) |
Trade & Regulatory
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 5561-99-9
- EC Number
- -
- Mol. Weight
- 310.5
- Category
- Organic Acids