Description

Poly(Dipropylene Glycol) Phenyl Phosphite is a specialized organophosphite compound widely utilized as a high-performance stabilizer and antioxidant. Its primary value lies in its ability to effectively inhibit oxidative degradation and prevent color formation in sensitive polymer systems during high-temperature processing and long-term use. This makes it an essential additive for manufacturers in the plastics, synthetic fiber, and specialty chemical industries seeking to enhance product durability and appearance.

Application

• Polymer Stabilization: Acts as a highly effective secondary antioxidant and color stabilizer in polyolefins (PP, PE), polyesters (PET, PBT), and engineering plastics.
• Synthetic Fiber Production: Used to prevent thermal and oxidative yellowing during the melt spinning and processing of nylon and polyester fibers.
• Adhesive & Sealant Formulations: Enhances the shelf-life and thermal stability of hot-melt and reactive adhesive systems.
• Elastomer Processing: Protects synthetic rubbers from scorching and maintains physical properties during compounding and extrusion.
• Lubricant & Grease Additive: Serves as an antioxidant additive in synthetic lubricants and industrial greases to extend service life.
• Coating Resins: Improves the color stability and processing window of powder coatings and coil coating resins.
• Masterbatch & Compound Production: A key component in antioxidant and stabilizer concentrate masterbatches for simplified dosing in plastics production.

Basic Information

Product Name	Poly(Dipropylene Glycol) Phenyl Phosphite
CAS No.	116265-68-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Phenyl Di(Propylene Glycol) Phosphite; Dipropylene Glycol Phenyl Phosphite; Phosphorous Acid, Phenyl Bis(2-methyl-2-oxiranylmethyl) Ester; PDGPP; Antioxidant PDGPP; Poly(Dipropylene Glycol) Phenyl Phosphite; Stabilizer 116265-68-0; Phenyl Bis(2-methyloxiran-2-yl)methyl Phosphite
EINECS	Contact for details

Quality Control

Our production of Poly(Dipropylene Glycol) Phenyl Phosphite adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against comprehensive specifications, including assay, color, acidity, and refractive index. Certificates of Analysis (COA) documenting all test results are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) in the headspace of partially used containers is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, Colorless to Pale Yellow Liquid
Identification (IR)	Conforms
Assay	≥ 95.0%
Color (APHA)	≤ 50
Acidity (as H3PO4)	≤ 0.1%
Refractive Index (n20/D)	Contact for details
Density (g/mL, 20°C)	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.