Trisnonylphényl phosphite (TNPP) is a hydrolytically stable organophosphite antioxidant used as a processing stabilizer in PVC, polyolefins, and rubber, protecting against oxidative degradation during high-temperature polymer processing. SUNCHEM supports international buyers with TNPP sourcing from qualified Chinese producers, avec une documentation de qualité, coordination des exportations, et soutien logistique.

