Polyquaternium-1 ek cationic polymer hai jo mainly preservative ke taur par use hota hai eye drops, contact lens solutions aur kuch topical products mein. Yeh conditioning aur antistatic properties provide karta hai. Skin ko smooth aur manageable banata hai, aur frizz control mein bhi helpful hai. Usually sensitive eyes ke liye bhi safe maana jata hai kyunki gentle formulations mein use hota hai.