Description

Phenylbenzodioxaphosphorinoxide is a specialized organophosphorus compound with a unique heterocyclic structure. This chemical is valued in advanced material science and specialty synthesis for its specific reactivity profile. It serves as a critical intermediate or functional additive for researchers and manufacturers in high-performance polymer and flame retardant development. The compound is identified by CAS No. 4242-21-1.

Application

• Flame Retardant Synergist: Used as a key component in halogen-free flame retardant formulations for engineering plastics and epoxy resins.
• Polymer Modification: Acts as a reactive intermediate or additive to enhance thermal stability and char formation in high-performance polymers.
• Specialty Chemical Synthesis: Serves as a building block for synthesizing novel organophosphorus ligands, catalysts, or pharmaceutical intermediates.
• Material Science Research: Employed in R&D for developing new materials with tailored thermal and mechanical properties.
• Electronics Encapsulation: Potential use in flame-retardant coatings and encapsulants for electronic components.
• Adhesive & Composite Systems: Incorporated into specialty adhesives and composite matrices to improve fire resistance.

Basic Information

Product Name	Phenylbenzodioxaphosphorinoxide
CAS No.	4242-21-1
Molecular Formula	C₁₂H₉O₃P
Molecular Weight	232.17 g/mol
Synonyms	2-Phenyl-2-oxo-4H-1,3,2-benzodioxaphosphorin 4-oxide; 2-Phenyl-4H-1,3,2-benzodioxaphosphorin 2-oxide 4-oxide; Phenyl cyclic ethylene phosphorate; Phenyl saligenin phosphate; NSC 403058; 1,3,2-Benzodioxaphosphole, 2-phenyl-, 2-oxide; Cyclic phenyl ethylene phosphate
EINECS	224-207-7

Quality Control

Our production of Phenylbenzodioxaphosphorinoxide adheres to stringent quality management protocols. Each batch is characterized and tested to ensure consistent purity and performance, meeting the precise requirements of advanced material applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles 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). Keep away from incompatible materials such as strong bases and oxidizing agents. For long-term storage, consider an inert atmosphere to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	105 - 110 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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