DOPO (9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) is a high-performance reactive phosphorus-based flame retardant widely used in polymers, coatings, and resin systems. With an assay of ≥99 percent and low impurities, it ensures stable incorporation into polymer matrices and delivers strong, permanent flame-retardant performance through the formation of durable P–C bonds.
Beyond flame retardancy, DOPO provides multifunctional industrial benefits: it acts as a color protection agent in ABS, AS, PP, phenolic, and alkyd resins; serves as a metal chelating agent in specialized formulations; and functions as an organic activator in catalytic systems. Its robust reactivity allows seamless integration with olefins, ketones, epoxy groups, and a wide variety of resin chemistries.
DOPO is commonly selected by manufacturers of electronic materials, epoxy composites, engineering plastics, and polymer intermediates due to its thermal stability, compatibility, and dependable performance.
Technical Specifications:
• CAS Number: 35948-25-5
• EC Number: 252-813-7
• Chemical Name: 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide
• Molecular Formula: C12H9PO2
• Molecular Weight: 216
• Appearance: White flake solid
• Melting Point: 116–120°C
• Assay: ≥99%
• Chloride Content: ≤10 ppm
• Loss on Drying: ≤0.5%
• Phosphorus Content: ≥14%
Key Features:
1) High Purity and Strong Reactivity
Assay ≥99 percent ensures efficient reaction with polymers, leading to enhanced flame retardancy and long-term stability.
2) Color Protection Functionality
Stabilizes resin coloration during high-temperature processing in ABS, AS, PP, phenolic and alkyd systems.
3) Versatility Across Polymer Systems
Suitable for olefins, ketones, epoxies, and a wide range of resins as a reactive flame retardant, additive, or intermediate.
4) Low Impurity Profile
Very low chloride level (≤10 ppm) supports performance consistency and protects sensitive formulations.
Applications:
1) Reactive Flame Retardant
Reacts directly with ABS, AS, PP, epoxy, phenolic, polyester, and polyurethane systems to enhance fire resistance.
2) Flame Retardant Intermediate
Serves as a key raw material in the synthesis of other phosphorus-based flame-retardant compounds.
3) Color Protection Additive
Prevents discoloration during polymer processing and improves appearance retention.
4) Metal Chelating & Organic Activation
Used in specialty formulations requiring chelating capability or catalytic activation.
Storage Conditions:
Store in a cool, dry, well-ventilated warehouse.
Avoid moisture and strong oxidizers.
Keep container tightly sealed and handle gently to minimize dust formation.
