In what products would you most likely find Quats used?

Quaternary ammonium compounds, commonly known as Quats, are commonly used in hair care products such as shampoos and conditioners due to their ability to act as conditioning agents and surfactants. They help to reduce static, enhance softness, and improve the manageability of hair. Their positive charge allows them to bind to the negatively charged strands of hair, providing slip and easing detangling after washing.

In contrast, while Quats may occasionally be present in small amounts in other cosmetic formulations, they are most prominently featured in hair care products. Products like face creams, perfumes, and sunscreens typically utilize other types of ingredients that are more aligned with their functions, such as moisturizers, emulsifiers, or fragrance components. Therefore, the association of Quats with shampoos and conditioners is the most relevant and accurate identification of their usage.