Polyquaternium-37 is widely used in the personal care and cosmetics industry due to its conditioning and film-forming properties. It is commonly found in hair care products such as shampoos, conditioners, and styling gels, where it helps to improve hair manageability, reduce frizz, and enhance shine. The chemical acts as a cationic polymer, which binds to the negatively charged hair strands, providing long-lasting softness and smoothness. Additionally, it is used in skin care formulations to improve the texture and feel of creams and lotions, offering a silky and non-greasy finish. Its film-forming ability also helps to retain moisture, making it beneficial for hydrating products. In some cases, it is incorporated into color cosmetics to enhance the adherence and longevity of pigments. Overall, Polyquaternium-37 is valued for its multifunctional role in enhancing product performance and user experience.