RDP flame retardant|57583-54-7

The CAS number for RDP flame retardant is 57583-54-7. Its English name is tetraphenyl m-phenylene bis(phosphate), with a phosphorus content of 10.8% and a decomposition temperature of 300°C. The full Chinese name is m-Phenylene Bis(diphenyl Phosphate). It can be used for flame retardancy in polycarbonate (PC), ABS, polyphenylene oxide (PPO), epoxy resin (EP), phenolic resin, rubber, and textile fibers. RDP is a commonly used phosphate ester flame retardant characterized by low addition levels, high flame retardancy efficiency, excellent thermal stability, good dispersion, broad applicability, and low volatility.

Basic Information

Product Name: RDP Flame Retardant

Chemical Name: tetraphenyl m-phenylene bis(phosphate)

CAS No.: 57583-54-7

Molecular Formula: C30H24O8P2

Phosphorus Content (wt.%): 10.8

Molecular Weight: 570.4247

EC No.: 260-830-6

Color (APHA): ≤80

Acid Value (mg KOH/g): ≤0.10

Moisture Content (w/w): ≤0.20%

Relative Density (50°C): 1.347 g/cm³

Boiling Point: 412.40 °C

Refractive Index (25°C): 1.5518–1.5630

Closed Cup Flash Point: 225°C

Physical and Chemical Properties

1. RDP flame retardant is soluble in various organic solvents such as toluene, xylene, and chloroform, but exhibits low solubility in water.

2. It remains stable under normal temperature and pressure conditions but may undergo decomposition reactions under high temperatures, strong acids, or strong alkalis. Its decomposition temperature exceeds 300°C.

Product Specifications

Color (APHA) ≤80

Acid Value (mg KOH/g) ≤0.1

Moisture Content (wt.%) ≤0.05

Density (25°C, g/cm³) 31.315 ± 0.010

Viscosity (25°C, mPa·s): 500-800

TPP (wt.%) ≤5.0

Phenol (ppm) ≤500

Appearance: Colorless to pale yellow transparent liquid

Application Fields

1. RDP flame retardant exhibits excellent compatibility with nylon PA, causing no adverse effects on its tensile strength or toughness while reducing thermal deformation at high temperatures. It is widely used in intake manifolds, motor housings, electronic equipment enclosures, etc.

2. RDP exhibits good temperature resistance, withstanding processing temperatures of 280-320°C. It is suitable for complex injection-molded parts like cooling fans, connectors, and precision instrument housings.

3. RDP can be used in TPU films, hoses, or molded products, including automotive wiring harness sheaths, industrial conveyor belts, and building waterproofing materials. It exhibits good compatibility with TPU's polar groups, resists migration, and maintains flame retardancy over extended use.

Packaging

Packaged in iron drums, net weight 250 kg.

RDP flame retardant possesses certain toxicity and may irritate skin, eyes, and respiratory tract. During handling, avoid inhaling vapors or mist droplets and prevent contact with skin and eyes. If contact occurs, immediately rinse with copious amounts of water and seek prompt medical attention. RDP requires relatively low addition levels, typically achieving flame retardancy standards at 5%-15%. Compliant with environmental regulations such as RoHS and REACH, it is suitable for developing eco-friendly materials. It provides both flame retardancy and plasticizing effects, improving material processability.

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