Tetrabromophthalic anhydride(TBPA)

Basic Info:

  • Chemical Synonym(s): 1,3-Isobenzofurandione, 4,5,6,7-tetrabromo-; 4,5,6,7-tetrabromo-2-benzofuran-1,3-dione;
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  • CAS Number: 632-79-1
  • Chemical Formula:


  • MSDS: Download


2.771 g/cm3
Boiling Point
540.5ºC at 760 mmHg
Melting Point
Flash Point
Vapor pressure
0.11 mm Hg ( 180 °C)
Refractive index
1.5000 (estimate)
Storage temp.
Store below +30°C.
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Tetrabromophthalic anhydride (TBPA) is an organic compound that is a derivative of phthalic anhydride. It is a crystalline solid, classified as a cyclic bromide, and is soluble in water and other polar solvents.

It is often used in the production of resins and polycarbonates.

It is a chemical reagent and is commonly used in chemical synthesis, especially for other chemicals. It has various uses, including the production of chemical salts and the formation of flame retardant fibers.

Although it has many applications, it is also a potentially hazardous chemical.


Tetrabromophthalic anhydride(TBPA) is a flame retardant chemical compound used as a flame retardant in some plastics, fabrics, and textiles.  It is also used as a fire retardant coating on paper, fabric, plastic, and rubber. 

It is used as a building block and phase transfer catalyst in the manufacture of dyestuff intermediates.

It is used as an intermediate in the synthesis of isobutyrlchloroethyl isobutyrate, a raw material for the production of rubber toughening agents and the synthesis of ethylene dibromide as raw materials of organic intermediates.

It has been used as a dyestuff intermediate to produce azo dyes, benzamide, and isothiazolinone dyes.

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