Description

2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane, 3,9-Bis(2-Phenylethyl)-, 3,9-Dioxide is a high-performance organophosphorus compound, specifically a spirocyclic phosphonate ester, valued for its role as a reactive flame retardant and polymer modifier. Its unique molecular structure provides excellent thermal stability and compatibility with various polymer matrices, making it a critical additive for enhancing material safety and performance. This product is essential for formulators and manufacturers in the plastics, coatings, and specialty chemical industries seeking advanced flame-retardant solutions.

Application

• Reactive Flame Retardant for Polymers: Incorporated into epoxy resins, polyurethanes, and unsaturated polyesters to impart flame retardancy during polymerization.
• Additive for Engineering Plastics: Used to improve the fire resistance of high-performance plastics like PBT, PET, and polyamides (nylons).
• Coating Formulations: Enhances the flame-retardant properties of protective and decorative coatings for wires, cables, and electronic components.
• Adhesive and Sealant Systems: Acts as a flame-retardant component in high-temperature adhesives and sealants.
• Synthetic Intermediate: Serves as a key building block in the synthesis of more complex phosphorus-containing specialty chemicals.
• Textile Treatment: Applied in formulations for producing flame-retardant fabrics and fibers.

Basic Information

Product Name	2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane, 3,9-Bis(2-Phenylethyl)-, 3,9-Dioxide
CAS No.	62284-92-8
Molecular Formula	C23H30O6P2
Molecular Weight	464.43 g/mol
Synonyms	3,9-Bis(2-phenylethyl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane 3,9-dioxide; Spirocyclic PEPA Derivative; DOPO-PEPA; Phenethyl PEPA; Reactive Spirocyclic Phosphonate; FR-Spiro; Bis(phenethyl) PEPA Dioxide; 1-Oxa-3,9-diphosphaspiro[5.5]undecane derivative
EINECS	Contact for details

Quality Control

Our production of 2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane, 3,9-Bis(2-Phenylethyl)-, 3,9-Dioxide adheres to a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including HPLC, NMR, and GC to confirm identity, assay, and impurity profiles. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment to support your quality assurance protocols.

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 strong oxidizers and heat sources. The container should be kept tightly sealed when not in use to minimize exposure to atmospheric moisture.

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%
Heavy Metals (as Pb)	≤ 10 ppm
Residual Solvents (GC)	Meets ICH guidelines

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