Is Isononyl Isononanoate natural?

Isononyl Isononanoate is made by esterifying isononanoic acid with isononyl alcohol, both produced from di-isobutylene via the oxo (hydroformylation) process on petroleum-derived olefins. No commercially significant natural route exists for either fragment.

Isononyl Isononanoate is an ester formed through the esterification reaction between isononanoic acid and isononanol. The industrial synthesis typically involves reacting these two components under acidic catalysis. Common catalysts include sulfuric acid, p-toluenesulfonic acid, or solid acid catalysts like ion-exchange resins.

The reaction is usually carried out at elevated temperatures, typically ranging from 120°C to 180°C, to drive the equilibrium towards ester formation and facilitate the removal of water, a byproduct of the esterification. This water removal is often achieved through azeotropic distillation, using a solvent like toluene or xylene, or by operating under vacuum.

Following the esterification, the crude product undergoes purification steps to remove unreacted starting materials, catalyst residues, and any byproducts. This typically involves neutralization of the acid catalyst, washing with water or dilute alkali solutions, drying, and finally, distillation under vacuum to obtain the high-purity Isononyl Isononanoate. The final product is a clear, colorless to pale yellow liquid with a mild odor.

Isononyl Isononanoate is a synthetic ingredient commonly used in cosmetics and skincare products. It's a type of ester, created by combining two alcohol-like molecules, isononanol and isononanoic acid. These starting materials are derived from petroleum, meaning this ingredient is not sourced from plants or animals.

Its primary role in cosmetic formulations is as an emollient. This means it helps to soften, smooth, and condition the skin by forming a protective layer on its surface. This layer helps to reduce water loss from the skin, keeping it hydrated and supple. It also contributes to the luxurious feel of many creams and lotions, improving spreadability and providing a non-greasy finish.