Lead(II) acetate trihydrate is used as a mordant in textile dyeing to help fix dyes onto fabrics, especially with natural fibers like cotton and wool. It enhances color fastness and improves dye uptake. In laboratory analysis, it is employed to detect sulfides in various samples, forming a black precipitate of lead sulfide, and is commonly used as a reagent in test papers for sulfides. It is also utilized in the production of other lead compounds and in specialized chemical synthesis processes. Historically, it was used in cosmetics and hair dyes, though such applications are now severely restricted due to lead's high toxicity. Occasionally, it is used in small amounts in industrial coatings and primers for its drying properties. Due to toxicity concerns, it is not suitable for food, pharmaceutical, or consumer applications and its use is limited to controlled industrial and analytical settings.