TETRABROMOPHTHALIC ANHYDRIDE Chemical Name: Tetrabromophthalic Anhydride Brand Name:RK-463 Equivalent Grade:PHT-4 CAS NO.: 632-79-1 Chemical Formula: C8Br4O3 Molecular Weight: 463.7 Application: As a reaction burning-resistant agent, RK-463 is used for polyester, unsaturated polyester, epoxy resin. As additive burning-resistant agent,RK-463 can be used for polystyrene, polypropylene, and ABC resin, with antimony trioxide and other engineering plastics and synthetic materials and composing of fine chemical substance.