Diisopropyl Sebacate, scientifically identified by CAS number 7491-02-3, is a diester derived from sebacic acid and isopropyl alcohol. Its chemical structure grants it a unique set of properties that make it a highly valuable ingredient in cosmetic and personal care product formulation. Understanding these technical aspects is key to harnessing its full potential.

Chemically, Diisopropyl Sebacate (C16H30O4) is a clear, colorless, and odorless liquid with a molecular weight of approximately 286.41 g/mol. Its physical properties, such as a boiling point around 308.2°C and a flash point of 134.9°C, indicate its stability under typical processing conditions. Crucially, its low solubility in water (0.5672 mg/L at 25°C) contributes to its hydrophobic nature, which is fundamental to its function in enhancing water resistance in products like sunscreens.

The primary technical roles of Diisopropyl Sebacate in cosmetic formulations are as an emollient, plasticizer, and solvent. As an emollient, its structure allows it to spread easily across the skin, forming a light film that prevents moisture loss and imparts a smooth, soft feel. This effect is critical for skin conditioning, providing a desirable sensory profile that consumers seek in moisturizers and lotions. The Diisopropyl Sebacate emollient benefits are directly linked to its molecular structure and low surface tension.

As a plasticizer, Diisopropyl Sebacate reduces the brittleness of polymer films. In makeup products like nail polish and lipstick, this property ensures flexibility, preventing cracking and improving the wearability of the product. The Diisopropyl Sebacate plasticizer properties are vital for product durability and aesthetic appeal, contributing to the overall performance of the cosmetic item.

Its utility as a solvent is also technically significant. Diisopropyl Sebacate can effectively dissolve various cosmetic ingredients, including UV filters and fragrance compounds. This solvent capability ensures uniform distribution of these ingredients within the formulation, leading to stable and effective products. Its function as a solvent for fragrances in cosmetics is a direct result of its polarity and molecular compatibility.

The formulation benefits are numerous: it offers improving spreadability of skincare products by lowering viscosity and enhancing slip. Its contribution to water resistance in sunscreens is a direct outcome of its hydrophobic characteristics, forming a barrier against water. Furthermore, its designation as a biodegradable cosmetic ingredient and a low toxicity cosmetic raw material makes it an environmentally conscious and safe choice for formulators.

When considering the technical specifications and performance attributes, Diisopropyl Sebacate proves to be a highly versatile ingredient. The wide range of Diisopropyl Sebacate cosmetic applications, from skincare to makeup, highlights its adaptability. For professionals in the field, understanding the chemistry behind its performance, as identified by CAS 7491-02-3, allows for the creation of sophisticated, high-performing products that meet the demands of modern consumers.