Widely used as a reducing agent in chemical synthesis, particularly in the production of other tin compounds and in electroless plating processes. It serves as a catalyst in the manufacturing of polylactic acid (PLA), a biodegradable polymer used in plastics and textiles. Commonly employed in the textile industry as a mordant to improve dye fastness on fabrics. Used in the silvering of mirrors and glass coatings, where it helps deposit a uniform metallic layer. Found in some oral care products for its ability to reduce tooth sensitivity and prevent enamel erosion. Also utilized in analytical chemistry for qualitative detection of gold, iron, and mercury ions due to its strong reducing properties.