Tri Basic Lead Sulphate (TBLS) is an invaluable inorganic compound, noted for its white to slightly yellow powder form. With the chemical formula Pb4O(SO4)3, it finds primary use in the PVC industry as a dual-purpose stabilizer and pigment. TBLS distinguishes itself with its excellent thermal stability, maintaining its integrity under high temperatures. Its superior weatherability, marked by resistance to moisture, UV light, and temperature fluctuations, make it an ideal choice for outdoor applications. Compared to other lead compounds, TBLS stands out for its lower toxicity. As a PVC stabilizer, it is widely used in high-temperature processes, and as a pigment, it offers color and opacity to a variety of industrial products.