Description

3,9-Bis[3-Bromo-2,2-Bis(Bromomethyl)Propoxy]-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane 3,9-Dioxide is a highly effective brominated phosphorus-based flame retardant, valued for its exceptional thermal stability and compatibility with various polymer matrices. This compound is engineered to provide superior fire resistance while maintaining the physical properties of the host material. It is a critical additive for manufacturers in the plastics, textiles, and electronics industries seeking to meet stringent international fire safety standards.

Application

• Primary flame retardant for engineering thermoplastics such as polyamides (nylon), polyesters (PBT, PET), and polycarbonates.
• Additive for polyurethane foams (flexible and rigid) used in furniture, automotive interiors, and insulation.
• Flame-retarding component in epoxy resin systems for printed circuit boards (PCBs) and electronic encapsulants.
• Enhancing fire safety in synthetic fibers and textiles for protective clothing and upholstery.
• Used in wire and cable coating compounds to improve flame retardancy.
• Formulation component for intumescent coatings and fire-retardant paints.
• Additive for adhesives and sealants requiring improved fire resistance.

Basic Information

Product Name	3,9-Bis[3-Bromo-2,2-Bis(Bromomethyl)Propoxy]-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane 3,9-Dioxide
CAS No.	61090-89-9
Molecular Formula	C17H24Br8O8P2
Molecular Weight	1103.37 g/mol
Synonyms	Brominated Spirocyclic Phosphonate Ester; FR-720; 3,9-Bis(3-bromo-2,2-bis(bromomethyl)propoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane 3,9-dioxide; Spirocyclic Brominated Phosphonate; Tetrabromobisphenol A Bis(2,3-dibromopropyl ether) Phosphonate Derivative; PBDPO; Flame Retardant 61090-89-9
EINECS	Contact for details

Quality Control

Our production of 3,9-Bis[3-Bromo-2,2-Bis(Bromomethyl)Propoxy]-2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5.5]Undecane 3,9-Dioxide adheres to a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, bromine content, and thermal performance. Certificates of Analysis (COA) detailing assay, impurity profile, and physical properties are provided to guarantee compliance with your technical requirements and industry standards.

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 heat sources and incompatible materials. Due to its light-sensitive nature, containers should be kept in original packaging or opaque storage until use.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Bromine Content	≥ 57.0%
Phosphorus Content	≥ 5.6%
Melting Point	105 - 115 °C
Volatile Matter	≤ 0.5%
Acidity (as H3PO4)	≤ 0.1%

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