The Cosmetic Use Ethanolamine segmentation by application delineates four principal categories that together drive the market’s revenue. Skin Care products—primarily moisturizers, cleansers, and serums—account for the largest share, leveraging ethanolamine’s pH‑adjusting and emulsifying properties to stabilize formulations; this segment contributes roughly 40 % of total sales. Hair Care applications, including shampoos, conditioners, and styling agents, rely on ethanolamine for viscosity control and scalp compatibility, representing about 30 % of the market. Color Cosmetics such as foundations, powders, and lip products use ethanolamine to improve pigment dispersion and texture, delivering an estimated 20 % of revenue. Finally, Personal Care items—deodorants, aftershave balms, and body lotions—utilize ethanolamine for its surfactant and buffering functions, accounting for the remaining 10 %. Collectively, these application segments define the market taxonomy and illustrate how functional demands across product lines allocate the overall market size.