1. Acts 4 4'-Di-tert-butylbiphenyl as a high-temperature antioxidant and heat stabilizer, efficiently inhibiting thermal-oxidative degradation of polyolefins and engineering plastics during high-temperature processing and service.

2. Serves 4 4'-Di-tert-butylbiphenyl CAS 1625-91-8 as a functional organic material, stably preparing high-performance liquid crystal compounds and OLED device additives with excellent thermal and chemical stability for optoelectronic manufacturing.

3. Functions as an organic synthesis building block, reliably producing substituted biphenyl derivatives for pharmaceutical intermediates and specialty fine chemical production.

Store 4 4'-Di-tert-butylbiphenyl CAS 1625-91-8 (white crystalline powder, mp 164-167℃, density 0.97g/cm³, purity ≥99%, air/heat-stable) at 5–30℃ in sealed HDPE drums/amber glass containers in a cool, dry, well-ventilated area, away from strong oxidants, open fire and high temperatures. Wear nitrile gloves, safety goggles and dust mask; avoid dust inhalation, skin/eye contact and ingestion to prevent mild irritation. Reseal tightly post-use; dispose of waste per local aromatic hydrocarbon fine chemical environmental regulations.

4 4'-Di-tert-butylbiphenyl CAS 1625-91-8 is an industrial aromatic hydrocarbon fine chemical raw material, not for direct pure-form human contact or ingestion; undiluted dust may cause mild respiratory/skin irritation, and high-temperature combustion releases toxic fumes.

In regulated use, 4 4'-Di-tert-butylbiphenyl CAS 1625-91-8 features ultra-high thermal stability (decomposition temp >300℃), excellent oxidation resistance, good compatibility with polymers, and the tert-butyl groups enhance steric hindrance for long-term stabilization with low dosage (0.1%–0.5%).