Trideceth-9 ek polyethylene glycol ether hai jo tridecyl alcohol se bana hai. Isse skincare aur cosmetic products mein nonionic surfactant, emulsifier aur solubilizer ke taur par use hota hai. Ye oil aur water phases ko acha se blend karta hai aur fragrances ke saath saath doosre oil-soluble ingredients ko bhi acche se disperse karta hai. Ye alag-alag textures ko ek saath mix karne mein helpful hota hai.