Cresyl Diphenyl Phosphate (CDP)

Name: Cresyl Diphenyl Phosphate (CDP)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 26444-49-5

Cresyl diphenyl phosphate (CDP) is an aryl phosphate ester flame retardant and plasticizer offering a balance between the plasticizing efficiency of alkyl phosphates and the thermal stability of fully aryl phosphates. It is used in flexible PVC, polyurethane, and cellulose ester compounds where a secondary plasticizer with FR properties is needed. CDP's mixed aryl structure provides lower viscosity than tricresyl phosphate while maintaining good hydrolytic stability and thermal performance.

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Technical Specifications

appearance	Colorless to pale yellow liquid
moisture (%)	<0.1
flash point (COC, °C)	>220
phosphorus content (%)	8.1–8.6
density (20°C, g/cm³)	1.20–1.22
viscosity (25°C, mPa·s)	15–35

Applications

Secondary plasticizer with FR properties in flexible PVC compounds
Polyurethane foam co-plasticizer and flame retardant additive
Cellulose acetate and nitrocellulose lacquer flame retardant plasticizer
Hydraulic fluid and fire-resistant functional fluid component
Rubber and elastomer compounds requiring both plasticization and FR

Key Features

Lower viscosity than TCP while maintaining comparable FR performance, simplifying cold-weather processing
Mixed aryl structure balances plasticizing efficiency and thermal/hydrolytic stability for PVC applications
Dual function as secondary plasticizer and FR reduces DOP/DEHP level while maintaining flame retardancy
Compatible with primary phthalate and adipate plasticizers in flexible PVC formulations