4,4'-Diaminostilbene is a core aromatic amine intermediate with excellent fluorescent activity and stable molecular structure. It is the key raw material for synthesizing fluorescent whitening agents, widely used in papermaking, textile printing and dyeing, detergent and plastic industries to improve product whiteness and brightness. It can undergo diazotization, condensation and coupling reactions to prepare various reactive dyes, acid dyes and organic pigment products. In fine chemical field, it is used for manufacturing optical brightener series products and organic photoelectric functional materials. It also serves as synthetic intermediate for pharmaceutical chemicals and chemical analytical reagents, and plays an important role in the production of daily chemical additives and polymer material modifiers, occupying an important position in dye and auxiliary agent industrial chain.

This product belongs to toxic irritant chemical with certain health hazards. Inhalation of dust will severely irritate respiratory tract, cause cough, chest pain and breathing difficulties, long-term inhalation may damage respiratory system function. Skin contact easily causes allergic dermatitis, red swelling, itching and skin erosion after long-term contact. Eye contact leads to severe stinging, conjunctival injury and blurred vision, must be rinsed with plenty of running water for more than 15 minutes immediately. Accidental ingestion will cause severe nausea, vomiting, abdominal pain and damage to liver and kidney organs. Operators must wear full set of protective equipment including gas mask, acid-base resistant gloves and safety goggles, and operate in fully ventilated workshop. Strictly isolate from food, feed and daily necessities during storage and transportation. All waste residues and contaminated packaging shall be treated strictly in accordance with hazardous waste disposal standards to prevent personal poisoning and environmental pollution risks.