Description

3,9-Dibenzyl-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane 3,9-Dioxide is a specialized organophosphorus compound belonging to the class of spirocyclic phosphates. This high-purity chemical intermediate is valued for its unique molecular architecture, which imparts specific reactivity and stability characteristics. It is primarily sought after by R&D chemists and process engineers in the advanced materials and polymer industries for the development of novel flame retardants, stabilizers, and specialty monomers.

Application

• Flame Retardant Synergist: Acts as a key intermediate in the synthesis of high-performance, halogen-free flame retardants for engineering plastics, epoxy resins, and polyurethane foams.
• Polymer Additive Precursor: Used to manufacture specialized phosphonate-based additives that enhance the thermal stability and UV resistance of polymers.
• Ligand in Coordination Chemistry: Serves as a chelating agent or ligand precursor in the development of metal-organic frameworks (MOFs) and catalysts.
• Pharmaceutical Intermediate: Employed in research for the synthesis of complex molecules with potential biological activity, leveraging its spirocyclic phosphate core.
• Electrolyte Additive Research: Investigated for use in lithium-ion battery electrolytes to improve stability and safety performance.
• Cross-linking Agent: Functions as a reactive monomer or cross-linker in the formulation of specialty thermosetting resins with tailored properties.

Basic Information

Item	Details
Product Name	3,9-Dibenzyl-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane 3,9-Dioxide
CAS No.	20544-37-0
Molecular Formula	C23H24O6P2
Molecular Weight	458.38 g/mol
Synonyms	Dibenzyl Pentaerythritol Bisphosphonate; Spirocyclic Pentaerythritol Bisphosphonate; 3,9-Dibenzyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane 3,9-dioxide; BDBP; Pentaerythritol Bis(benzylphosphonate); SPDBP; Bis(benzyl) Pentaerythritol Diphosphonate
EINECS	Contact for details

Quality Control

Every batch of 3,9-Dibenzyl-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane 3,9-Dioxide is manufactured and tested under a strict quality management system. We ensure compliance with relevant industry standards through rigorous analytical protocols. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee batch-to-batch consistency and support your quality assurance processes.

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). This compound is easily oxidized and should be stored under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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