Elaidic acid
CAS 112-79-8
EC 204-006-6
Formula C18H34O2
MW 282.46 g/mol
Organic Acids Food & NutritionLubricants & MetalworkingPersonal Care & Cosmetics LubricationEmulsification & Dispersion
Description
Elaidic acid (CAS 112-79-8) is the trans-isomer of oleic acid, a C18 monounsaturated fatty acid also referenced under the names trans-oleic acid and 9E-octadecenoic acid. It carries no assigned E-code and is distinct from its cis-counterpart in both geometry and physical behaviour.
In food and nutrition formulations, elaidic acid serves as a reference standard and analytical marker for trans-fat quantification, enabling accurate compliance testing against regulatory limits. In lubricant and metalworking applications, its fatty acid chain provides boundary lubrication by adsorbing onto metal surfaces, reducing friction and wear under load. Personal care formulators use it as an emulsification aid to stabilise oil-in-water systems.
Elaidic acid is supplied as a liquid and is available in research and technical grades. It falls under REACH registration requirements for supply within the EU and is classified under HS code 2916.19.3000. Procurement teams should confirm grade specifications and minimum order quantities directly with the supplier.
In food and nutrition formulations, elaidic acid serves as a reference standard and analytical marker for trans-fat quantification, enabling accurate compliance testing against regulatory limits. In lubricant and metalworking applications, its fatty acid chain provides boundary lubrication by adsorbing onto metal surfaces, reducing friction and wear under load. Personal care formulators use it as an emulsification aid to stabilise oil-in-water systems.
Elaidic acid is supplied as a liquid and is available in research and technical grades. It falls under REACH registration requirements for supply within the EU and is classified under HS code 2916.19.3000. Procurement teams should confirm grade specifications and minimum order quantities directly with the supplier.
Physical Properties
| Melting Point | 45 °C |
| Boiling Point | 288 °C/100 mmHg (lit.) |
| Density | 0.8734 g/cm³ @ Temp: 20 °C |
| Flash Point | >230 °F |
| Color | Off-White |
| Form | Liquid |
| Water Solubility | Insoluble in water. |
| Refractive Index | 1.4597 (589.3 nm 20℃) |
| Log P | 7.698 (est) |
Safety & Handling (Learn More)
Warning GHS07
H
H315H319H335
P
P261P264P271P280P319P321P405P501P264+P265P302+P352P304+P340P332+P317P337+P317P362+P364P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 2916.19.3000 |
| WGK (Germany) | 1 |
Other Names
(E)-octadec-9-enoic acidtrans-Delta(9)-octadecenoic acid(E)-Oleic acidtrans-Oleic acidC18:1 (TRANS-9) ACID9E-OCTADECENOIC ACID
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