Tetrabromophthalic Anhydride (TBPA)

Name: Tetrabromophthalic Anhydride (TBPA)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 632-79-1

Tetrabromophthalic anhydride (TBPA) is a reactive halogenated flame retardant that can be chemically incorporated into polyester, polyurethane, and epoxy resin systems. With approximately 68% bromine content, TBPA reacts through its anhydride group to become part of the polymer backbone, delivering permanent, non-migratory flame retardancy. It is widely used in the production of flame-retardant polyols and alkyd resins.

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Technical Specifications

appearance	White to light yellow powder or crystalline solid
purity (%)	≥98
bromine content (%)	67–69
melting point (°C)	275–279
acid value (mgKOH/g)	270–285
phosphorus content (%)	0

Applications

Reactive flame retardant polyols for rigid and flexible polyurethane foams
Flame-retardant unsaturated polyester resins for FRP composites
Epoxy resin formulations for printed circuit board laminates
Alkyd and polyester coating resins with built-in flame retardancy
Reactive intermediate for synthesis of brominated FR compounds

Key Features

Reactive anhydride functionality allows covalent integration into polyester and polyurethane polymer chains
High bromine content (68%) provides effective flame retardancy at relatively low molar loadings
Non-migratory performance ensures long-term flame retardancy without blooming or extraction
Versatile reactive intermediate compatible with polyol, epoxy, and unsaturated polyester chemistries