Description

3,3'-Oxybis[8,9-Dibromo-2,4-Dioxa-3-Phosphaspiro[5.5]Undecane] 3,3'-Disulphide is a high-performance, brominated and phosphorus-containing organosulfur compound. This specialty chemical is engineered to serve as a highly effective flame retardant and smoke suppressant additive, particularly in demanding polymer applications. It is primarily utilized by formulators and manufacturers in the plastics, textiles, and advanced composite materials industries seeking to meet stringent fire safety regulations without compromising material integrity.

Application

• As a reactive or additive flame retardant in engineering thermoplastics such as polyamides (nylon), polyesters (PBT, PET), and polycarbonates.
• As a smoke suppression agent in wire and cable insulation, electronic housings, and construction materials to enhance fire safety performance.
• In the formulation of fire-resistant coatings and paints for structural steel, textiles, and wood.
• As a synergistic component in halogen-phosphorus flame retardant systems to improve efficiency and reduce overall loading in polymer matrices.
• For the production of fire-retardant synthetic fibers and textiles used in protective clothing, automotive interiors, and upholstery.
• In advanced composite materials for aerospace, automotive, and transportation sectors where weight-saving and fire resistance are critical.
• As a specialty intermediate in the synthesis of other high-value flame retardant chemicals.

Basic Information

Product Name	3,3'-Oxybis[8,9-Dibromo-2,4-Dioxa-3-Phosphaspiro[5.5]Undecane] 3,3'-Disulphide
CAS No.	58948-23-5
Molecular Formula	C20H28Br4O8P2S2
Molecular Weight	932.96 g/mol
Synonyms	Bis(8,9-dibromo-2,4-dioxa-3- phosphaspiro[5.5]undecane-3-yl) disulfide oxide; 3,3'-Disulfanediylbis(8,9-dibromo-2,4-dioxa-3-phosphaspiro[5.5]undecane) 3,3'-dioxide; Brominated spirocyclic phosphate disulfide; FR-SPD; Spirocyclic phosphate sulfide flame retardant; Oxybis(dibromodioxaphosphaspiroundecane) disulfide
EINECS	Contact for details

Quality Control

Our production of 3,3'-Oxybis[8,9-Dibromo-2,4-Dioxa-3-Phosphaspiro[5.5]Undecane] 3,3'-Disulphide adheres to a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with relevant industry specifications for flame retardant additives. Certificates of Analysis (COA) documenting key parameters such as assay, bromine content, and thermal stability are provided and available upon request.

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 oxidizing agents, strong acids, and strong bases. The product is moisture-sensitive; ensure containers are sealed after each use to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Bromine Content	34.0 - 35.0 %
Phosphorus Content	6.5 - 7.0 %
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.