Description

2,2'-[(2,5-Dimethyl-p-Phenylene)Bis(Methylene)]Bis[5,5-Dimethyl-1,3,2-Dioxaphosphorinane] 2,2'-Dioxide is a high-performance, halogen-free organophosphorus compound, primarily valued for its exceptional efficiency as a flame retardant and thermal stabilizer. Its unique molecular structure provides excellent thermal stability and compatibility with various polymer matrices, making it a critical additive for enhancing material safety and durability. This product is essential for manufacturers in the plastics, polymer, and advanced materials industries seeking to meet stringent fire safety regulations without compromising on material properties.

Application

• Primary Flame Retardant for engineering plastics such as polyamides (PA), polyesters (PBT, PET), and polycarbonates (PC).
• Synergistic Additive in intumescent flame retardant (IFR) systems for coatings, textiles, and construction materials.
• Thermal Stabilizer in high-temperature polymer processing to prevent degradation and maintain mechanical properties.
• Component in Specialty Formulations for wire and cable insulation requiring high flame retardancy and low smoke emission.
• Additive for Composite Materials used in automotive, aerospace, and electrical/electronic (E&E) components.
• Research & Development chemical for developing new flame-retardant polymers and materials.

Basic Information

Item	Detail
Product Name	2,2'-[(2,5-Dimethyl-p-Phenylene)Bis(Methylene)]Bis[5,5-Dimethyl-1,3,2-Dioxaphosphorinane] 2,2'-Dioxide
CAS No.	65850-54-6
Molecular Formula	C24H40O6P2
Molecular Weight	510.51 g/mol
Synonyms	Bis(5,5-dimethyl-2-oxido-1,3,2-dioxaphosphorinane-2-ylmethyl)-2,5-dimethylbenzene; 2,2'-(2,5-Dimethyl-1,4-phenylene)bis(methylene)bis(5,5-dimethyl-1,3,2-dioxaphosphorinane 2-oxide); FR-DDP; DDP; Halogen-free phosphonate flame retardant; PX-200 (typical trade name); 1,4-Bis[(5,5-dimethyl-2-oxido-1,3,2-dioxaphosphorinanyl)methyl]-2,5-dimethylbenzene
EINECS	Contact for details

Quality Control

Our production of 2,2'-[(2,5-Dimethyl-p-Phenylene)Bis(Methylene)]Bis[5,5-Dimethyl-1,3,2-Dioxaphosphorinane] 2,2'-Dioxide adheres to a stringent quality management system to ensure batch-to-batch consistency and high purity. All materials undergo rigorous analytical testing, including HPLC, NMR, and phosphorus content analysis, to confirm identity and potency. A comprehensive Certificate of Analysis (COA) documenting purity, moisture content, and key physical properties is provided with each 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as 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	105 - 115 °C
Loss on Drying	≤ 0.5%
Phosphorus Content	12.0 - 12.5%

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