Tetrabromobisphenol A (TBBPA)
CAS Number: 79-94-7
Featured inFlame Retardants
Tetrabromobisphenol A (TBBPA) is the world's highest-volume brominated flame retardant, used primarily as a reactive comonomer in epoxy resins for printed circuit board (PCB) FR-4 laminates and as an additive FR in ABS and HIPS. In epoxy systems, TBBPA is covalently incorporated into the polymer backbone via its phenolic OH groups, providing durable flame retardancy that does not leach or migrate. With 58.8% bromine content, it efficiently achieves UL94 V-0 in PCB and E&E applications when used with antimony trioxide synergist.
Technical Specifications
| appearance | White crystalline powder |
| purity (%) | ≥99 |
| color (APHA) | <50 |
| moisture (%) | <0.2 |
| bromine content (%) | 58.5–59.0 |
| melting point (°C) | 179–182 |
Applications
- Reactive FR comonomer in FR-4 epoxy PCB laminate manufacturing (primary use, >90%)
- Additive FR in ABS for consumer electronics and electrical equipment housings
- Intermediate for synthesizing TBBPA derivatives (bis-allyl ether, bis-carbonate) for thermoplastics
- Epoxy encapsulant and underfill materials for electronics packaging
- Polycarbonate and PC/ABS compounds with antimony trioxide synergist
Key Features
- Reactive incorporation into epoxy FR-4 resin provides permanent non-leaching flame retardancy in PCBs
- High bromine content (58.8%) achieves UL94 V-0 at modest loadings in epoxy and ABS systems
- World's most-used brominated FR with fully established supply chain and quality certification
- Versatile intermediate for synthesizing thermally stable TBBPA-bis-allyl ether and bis-carbonate derivatives
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