Ethyl isobutyl carbonate (EiBC) is a specialty chemical primarily used as a high-performance solvent in lithium-ion battery electrolytes, where it provides low viscosity, high dielectric constant, and excellent stability, contributing to improved battery performance and safety.

It is also employed as a solvent in various industrial applications, including the formulation of coatings, paints, and varnishes to enhance flow and leveling. In adhesives and sealants, it improves bonding strength and durability.

In the pharmaceutical industry, it serves as an intermediate in the synthesis of active pharmaceutical ingredients (APIs). Its role in chemical synthesis includes acting as a reagent or catalyst in the production of other specialty chemicals.

Additionally, ethyl isobutyl carbonate is utilized in the cosmetics and personal care industry as a solvent for fragrances and beauty products due to its ability to dissolve a wide range of substances, mild odor, and non-irritating properties. It may also find niche applications as a fuel additive to improve combustion efficiency and reduce engine deposits.

Overall, its diverse roles highlight its value as a versatile specialty chemical across electronics, pharmaceuticals, and other sectors.