1. Acts 2 2' 4 4'-Tetrahydroxybenzophenone as a high-efficiency UV absorber in plastic and coating processing, effectively preventing polymer aging and yellowing caused by UVA and UVB radiation.

2. Serves UV absorber BP-2 CAS 131-55-5 as a sunscreen additive in cosmetic formulations, blocking ultraviolet rays to protect skin from sun damage stably.

3. Functions as a key organic synthesis intermediate, supporting the preparation of pharmaceutical raw materials and photochromic derivatives reliably.

Store it (CAS 131-55-5, pale yellow crystalline powder, mp 198-200℃, density 1.50g/cm³) at 10–25℃ in sealed amber glass/HDPE containers in a cool, dry, dark and well-ventilated area. Isolate from strong oxidants, acids and direct sunlight to avoid discoloration and degradation. Wear nitrile gloves, safety goggles and dust mask; avoid dust inhalation, skin/eye contact and ingestion to prevent mild irritation and allergy. Reseal tightly post-use; dispose of waste per local UV absorber & chemical environmental regulations.

UV absorber BP-2 CAS 131-55-5 is an industrial UV absorber and synthetic intermediate, not for direct pure-form human contact or ingestion; undiluted contact may cause skin allergy and mucosal irritation, and long-term exposure has potential endocrine interference risks. In regulated applications, 2 2' 4 4'-Tetrahydroxybenzophenone features a wide UV absorption range (320-400nm), excellent thermal stability, good compatibility with polymers and cosmetics, and remarkable anti-aging effects with low dosage.