Description

Bis(4-Hydroxyphenyl)Phenylphosphine Oxide is a high-purity organophosphorus compound with a unique molecular structure featuring both phenolic and phosphine oxide functionalities. This compound matters as a versatile and critical intermediate in advanced material synthesis, offering thermal stability and reactivity for creating high-performance polymers. It is primarily needed by manufacturers in the polymer, electronics, and specialty chemical industries for developing flame-retardant materials, epoxy curing agents, and high-temperature resins.

Application

• As a key monomer or co-monomer in the synthesis of high-performance, flame-retardant polyphosphonates and polyarylates.
• As a reactive intermediate for manufacturing advanced epoxy resin curing agents and hardeners.
• In the production of specialty polymers for electronics, including encapsulants and printed circuit board laminates.
• As a building block for phosphorus-containing oligomers used as additives to enhance fire resistance in engineering plastics.
• In research and development of novel polymeric materials with improved thermal and mechanical properties.
• As a precursor for ligands or catalysts in specialized organic synthesis and coordination chemistry.

Basic Information

Product Name	Bis(4-Hydroxyphenyl)Phenylphosphine Oxide
CAS No.	795-43-7
Molecular Formula	C18H15O3P
Molecular Weight	310.29 g/mol
Synonyms	BHPPO; Phenol, 4,4'-(phenylphosphinylidene)bis-; 4,4'-Dihydroxytriphenylphosphine Oxide; (4-Hydroxyphenyl)phenylphosphinic Acid; Triphenylphosphine Oxide, 4,4'-Dihydroxy-; Phenylbis(4-hydroxyphenyl)phosphine Oxide; Phosphine Oxide, Phenylbis(4-hydroxyphenyl)-
EINECS	212-350-8

Quality Control

Our Bis(4-Hydroxyphenyl)Phenylphosphine Oxide is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use in high-value applications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	215 - 225 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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