Description

8,8-Dihydro-8,8-Diphenyl-2H,6H-[1,2]Oxaphospholo[4,3,2-Hi][2,1]Benzoxaphosphole CAS NO 51922-82-8 is a specialized organophosphorus compound featuring a complex, fused heterocyclic structure. This compound serves as a high-performance intermediate and functional additive, valued for its unique chemical architecture that imparts specific reactivity and properties. It is primarily utilized in advanced material science and specialty chemical synthesis, where its structural characteristics are leveraged to modify polymer properties or create novel molecular frameworks. Industries engaged in the development of flame retardants, high-temperature resins, and electronic materials will find this chemical of significant interest.

Application

• Flame Retardant Synergist/Intermediate: Acts as a key building block or additive in the formulation of advanced, halogen-free flame retardant systems for engineering plastics and polymers.
• Polymer Modification: Used to incorporate phosphorus-containing moieties into polymer backbones to enhance thermal stability, flame resistance, or adhesion properties.
• Specialty Chemical Synthesis: Serves as a sophisticated intermediate in the multi-step synthesis of complex ligands, pharmaceutical candidates, or agrochemicals requiring its specific fused ring system.
• Epoxy & Thermoset Resin Curing/Hardening: Functions as a reactive curing agent or hardener component for high-performance epoxy resins, improving their thermal and mechanical characteristics.
• Ligand for Catalysis: Its structure can be utilized to develop novel phosphorus-based ligands for transition metal catalysis in fine chemical production.
• Research & Development: Employed in academic and industrial R&D settings for exploring new materials with tailored optical, electronic, or mechanical properties.

Basic Information

Product Name	8,8-Dihydro-8,8-Diphenyl-2H,6H-[1,2]Oxaphospholo[4,3,2-Hi][2,1]Benzoxaphosphole
CAS No.	51922-82-8
Molecular Formula	C22H17O2P2
Molecular Weight	390.32 g/mol
Synonyms	DOPO-DP (common abbreviation); 8,8-Diphenyl-8H-dibenzo[d,f][1,3,2]dioxaphosphepin 8-oxide; 6H-Dibenzo[c,e][1,2]oxaphosphorin, 6,6-diphenyl-, 6-oxide; DOPO-Diphenyl derivative; 6,6-Diphenyl-6H-dibenzo[c,e][1,2]oxaphosphorin 6-oxide; P,P-Diphenylphosphinic acid cyclic phenyl ester; 1-Oxa-6-phosphaspiro[5.5]undeca-2,4-dien-6-one, 2,3,9,10-tetrahydro-2,2-diphenyl-
EINECS	Contact for details

Quality Control

Our production of 8,8-Dihydro-8,8-Diphenyl-2H,6H-[1,2]Oxaphospholo[4,3,2-Hi][2,1]Benzoxaphosphole adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectroscopic identification (IR, NMR), to ensure it meets precise customer specifications and internal standards. A detailed Certificate of Analysis (COA) documenting all test results is provided with each shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and moisture. 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 reference spectrum
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
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.