Thioindigo is widely used in the textile industry as a dye, particularly for coloring synthetic fibers like polyester. Its vibrant shades and excellent lightfastness make it suitable for producing long-lasting and bright colors in fabrics. Additionally, it is employed in the manufacturing of inks and pigments for printing applications, where color stability and durability are essential. In some cases, thioindigo is also utilized in organic synthesis as an intermediate for creating more complex chemical compounds. Its versatility and strong coloring properties make it a valuable component in various industrial processes.