antioxidant PDP, CAS 80584-68-7


English name:Poly(dipropylene glycol) phenyl phosphite

CAS NO. 80584-86-7

Molecular formula: C102H13O31P8

Molecular weight: 2100

chemical structure:


Appearance Clear Liquid

Color (APHA) ≤50

Acid Value (mgKOH/g) ≤0.1

Refractive Index (25 °C) 1.5200-1.5400 

Specific Gravity (25 °C)  1.130-1.1250

TGA (°C, % mass loss)

Weight loss, % Temperature, ° 

5  10

198 218


Antioxidant PDP is an auxiliary antioxidant for organic polymers. It is an effective liquid phosphite antioxidant for many dispersed polymer systems including PVC, ABS, polyurethane, polycarbonate, and coatings. Good color and thermal stability are provided both in the process and in the processing application. As an auxiliary stabilizer and chelating agent in PVC, it provides brighter and longer lasting color and improves the thermal stability of PVC. It can also be used in polymers that do not require food contact. The average addition amount is 0. 2-1. 0%.

Follow good industrial practices and avoid unnecessary human contact. The product should be stored in a dry and ventilated place at room temperature; away from fire and heat; away from strong oxidants and reducing agents. For details, please refer to our MSDS report.