1. Acts UV-329 as a high - efficiency UV absorber in polycarbonate, ABS and polyolefin processing, preventing polymer yellowing, embrittlement and mechanical property decline under outdoor sunlight exposure reliably.

2. Serves UV ABSORBER 329 CAS 3147-75-9 as a light stabilizer in automotive and architectural coatings, enhancing weather resistance and color retention of exterior coating films effectively.

3. Functions as a photoprotective additive in transparent plastic sheets, maintaining optical clarity and extending service life for outdoor glazing and signage applications stably.

Store UV - 329 (CAS 3147-75-9, white crystalline powder, odorless, mp 103-106℃, purity ≥99%, non - flammable) 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 oxidation and photodegradation. Wear nitrile gloves, safety goggles and dust mask; avoid dust inhalation, skin/eye contact and ingestion to prevent mild irritation. Reseal tightly after use; dispose of waste per local UV absorber environmental regulations.

UV - 329 is an industrial polymer UV absorber, not for direct pure - form human contact or ingestion; undiluted contact may cause slight skin dryness, and accidental intake will lead to gastrointestinal discomfort. In regulated applications, it has strong UV absorption (300-400nm) and minimal visible light absorption, excellent thermal stability for high - temperature processing, good compatibility with various polymers, and synergizes well with HALS/antioxidants to boost long - term weather resistance.