Octenyl Succinic Anhydride
What is Octenyl Succinic Anhydride?
Octenyl Succinate, commonly derived from starch modified with octenyl succinic anhydride (OSA), is an emulsifier and stabilizer used in skincare formulations to create oil-in-water emulsions and improve product texture. It functions by reducing surface tension and enhancing the dispersion of oil droplets in water-based products, making it ideal for creams, lotions, and sunscreens. This plant-based ingredient provides a natural alternative to synthetic emulsifiers, contributing to lightweight, non-greasy formulations.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Absorbent
Absorbs water and/or sebum to reduce greasiness and shine, improve dry touch, and help keep powders and emulsions feeling lighter on skin.
Bulking agent
Increases mass/volume to build structure and improve handling, commonly used to adjust feel, spread, and cost-in-use without acting as a primary active.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.