
Product Name: Optical Brightener 4BK / Fluorescent Brightener 113 / FBA 113 Chemical Name: Disodium Fluorescent Brightener 113 / Stilbene Disulfonic Acid Derivative Color Index: C.I. 113 CAS: 12768-92-2 Molecular Formula: C₄₀H₄₀N₁₂Na₂O₁₆S₄ / C₄₀H₄₂N₁₂Na₂O₁₀S₂ Formula Weight: 960.94 – 1165.05 g/mol Synonyms: Fluorescent Brightener 113; FBA 113; Optical Whitening Agent 4BK; Fluorescent Brightener 4BK; C.I. 113; Optical Brightening Agent 4BK Application: Textiles (Cotton, Viscose, Polyester/Cotton Blends, Nylon, Linen), Paper Manufacturing (Pulp Whitening, Surface Sizing), Laundry Detergents, Soaps
We specialize in the research, development, production, and global supply of optical brightener, masterbatches, pigments, dyes, titanium dioxide, detergent additives, and plastic additives. Based in China and serving the world, we provide stable and reliable chemical products and customized technical support to customers in the plastics, detergents, textile, coatings and paint ink industries.