Description

3,9-Bis(Isodecyloxy)-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane is a high-performance, halogen-free organophosphorus compound widely recognized for its exceptional flame-retardant properties. This specialized chemical is engineered to provide superior thermal stability and compatibility within demanding polymer matrices, making it a critical additive for enhancing material safety. It is primarily utilized by manufacturers in the plastics, electronics, and construction industries seeking to meet stringent fire safety regulations without compromising on material performance.

Application

• As a highly effective flame retardant and smoke suppressant in polyolefins, polyurethanes, and engineering plastics.
• Key additive in wire and cable insulation formulations to meet international fire safety standards (e.g., UL, IEC).
• Enhancing the fire resistance of thermoplastic elastomers (TPEs) and adhesives/sealants.
• Used in the production of electronic components and housings requiring halogen-free flame retardancy.
• Formulation component for construction materials such as pipes, panels, and coatings.
• Potential synergist in intumescent flame-retardant systems for enhanced performance.

Basic Information

Product Name	3,9-Bis(Isodecyloxy)-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane
CAS No.	26544-27-4
Molecular Formula	C26H54O6P2
Molecular Weight	524.64 g/mol
Synonyms	Bis(isodecyl) pentaerythritol bisphosphate; Pentaerythritol bis(isodecyl phosphate); FR C-2; FR C2; Spirocyclic pentaerythritol bisphosphorate ester; 3,9-Diisodecyloxy-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane; ADK STAB FP-2500S; ADK STAB FP-2500
EINECS	Contact for details

Quality Control

Our production of 3,9-Bis(Isodecyloxy)-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane adheres to strict quality management protocols. Every batch undergoes rigorous analytical testing, including assay, color, acidity, and moisture content analysis, to ensure consistent purity and performance. Certificates of Analysis (COA) documenting full specifications are available upon request to support your quality assurance and regulatory compliance needs.

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 heat sources and incompatible materials. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Acidity (as H3PO4)	≤ 0.5%
Color (APHA)	≤ 100
Moisture (KF)	≤ 0.5%
Phosphorus Content	11.5 - 12.5%

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