Description

Tetraphenyl Resorcinol Bis(Diphenylphosphate) is a high-performance organophosphorus compound widely recognized for its exceptional flame-retardant properties. This product matters because it provides a highly effective and thermally stable solution for enhancing fire safety in demanding polymer applications without compromising material integrity. Industries requiring advanced flame retardancy for engineering plastics, epoxy resins, and other high-temperature polymers will find this additive critical for meeting stringent safety and regulatory standards.

Application

• Primary flame retardant for engineering thermoplastics such as polycarbonate (PC), PC/ABS blends, and polyphenylene oxide (PPO).
• Flame-retardant additive for epoxy resin systems used in electronic encapsulants, laminates, and composites.
• Enhancing fire resistance in thermoset polyester resins for construction and transportation applications.
• Component in wire and cable insulation formulations to meet fire safety codes like UL 94.
• Used in specialty adhesives and coatings where flame retardancy is a key performance requirement.
• Potential synergist in intumescent fire-retardant systems for paints and coatings.

Basic Information

Product Name	Tetraphenyl Resorcinol Bis(Diphenylphosphate)
CAS No.	57583-54-7
Molecular Formula	C42H32O8P2
Molecular Weight	726.64 g/mol
Synonyms	RDP; Resorcinol Bis(Diphenyl Phosphate); Resorcinol Bis(Diphenylphosphate); Tetraphenyl Resorcinol Diphosphate; Bisphenol A Bis(Diphenyl Phosphate) Analog; Phosphoric Acid, 1,3-Phenylenetetraphenyl Ester; FR RDP; RDP Flame Retardant; 1,3-Phenylene Tetraphenyl Diphosphate
EINECS	Contact for details

Quality Control

Our Tetraphenyl Resorcinol Bis(Diphenylphosphate) is manufactured under a strict quality management system to ensure batch-to-batch consistency and high performance. Each lot is tested against rigorous internal specifications to guarantee purity, thermal stability, and efficacy as a flame retardant. A Certificate of Analysis (COA) detailing key parameters such as assay, phosphorus content, and thermal properties is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat, open flames, and strong oxidizing agents. The container must be kept tightly sealed to prevent moisture absorption.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Phosphorus Content	≥ 8.5 %
Melting Point	90 - 110 °C
Volatiles (Loss on Drying)	≤ 0.5 %
Acidity (as H3PO4)	≤ 0.1 %

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