Cotton Yarn and Tissue Paper Dyes Pink Red 12B Direct Red 31 CAS 5001-72-9

Direct Red 31, also known as Pink Red 12B (CAS 5001-72-9), is a versatile anionic dye widely used for the vibrant coloration of cotton yarns and cellulosic fibers. It is highly valued in the paper industry as a primary tissue pink paper dye, providing a soft yet brilliant pink hue with excellent water solubility and affinity for wood pulp. This dye ensures uniform penetration and consistent color depth, making it an ideal choice for manufacturing colorful napkins, decorative tissues, and high-quality cotton textiles that require a striking pink-red finish.