Description

Tris(4-Hydroxyphenyl)Phosphine Oxide is a versatile organophosphorus compound featuring a central phosphorus atom bonded to three phenolic groups. This unique structure makes it a valuable intermediate and functional additive in advanced material synthesis. It is primarily sought after by manufacturers in the polymer, electronics, and specialty chemical industries for its role as a flame retardant synergist, cross-linking agent, and monomer precursor.

Application

• Flame Retardant Synergist: Used in epoxy resins, polycarbonates, and other engineering plastics to enhance fire resistance and thermal stability.
• Polymer Cross-Linking Agent: Serves as a reactive intermediate to improve the mechanical strength and heat resistance of high-performance polymers.
• Pharmaceutical Intermediate: Employed in the synthesis of complex organic molecules and active pharmaceutical ingredients (APIs).
• Liquid Crystal & OLED Materials: Acts as a key building block in the production of advanced electronic display components.
• Adhesive & Coating Formulations: Imparts enhanced durability and chemical resistance to specialty coatings and adhesives.
• Research & Development: Utilized in academic and industrial R&D for developing novel organophosphorus compounds and materials.

Basic Information

Product Name	Tris(4-Hydroxyphenyl)Phosphine Oxide
CAS No.	797-71-7
Molecular Formula	C18H15O4P
Molecular Weight	326.29 g/mol
Synonyms	Tris(p-hydroxyphenyl)phosphine oxide; THPPO; 4,4',4''-Phosphinidynetris(phenol); Phosphorous acid tris(4-hydroxyphenyl) ester oxide; Phenol, 4,4',4''-phosphinidynetris-; Tris(4-hydroxyphenyl)phosphine P-oxide
EINECS	212-349-6

Quality Control

Our Tris(4-Hydroxyphenyl)Phosphine Oxide is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A Certificate of Analysis (COA) detailing all test results is provided with each shipment.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	210 - 215 °C
Loss on Drying	≤ 1.0 %
Heavy Metals	≤ 20 ppm

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