Product Introduction
Tetrabromophthalic anhydride (TBPA) is pale yellowish-white needle-like crystals or crystalline powder. It is insoluble in water and aliphatic hydrocarbon solvents, slightly soluble in chloroform and other chlorinated hydrocarbons, as well as in acetone and xylene. It is soluble in nitrobenzene and dimethylformamide, and is toxic.
Product Properties
| Product Name: | Tetrabromophthalic anhydride |
| Other Name: | PHT4; FHT-4; TBPA; TBPTA |
| CAS No.: | 632-79-1 |
| Molecular Formula: | C8Br4O3 |
| Structural formula: | ![]() |
Product Index
|
Item |
Index |
Test result |
|
Appearance |
White powder |
White powder |
|
Bromine content% |
67min |
67.8 |
|
Melting point℃ |
270min |
274 |
|
Sulfide% |
0.3max |
0.12 |
|
Moisture% |
0.2max |
0.1 |
Product Application

Tetrabromophthalic anhydride is an acid flame retardant with a high bromine content.
Reactive Flame Retardants: It can be used as a reactive flame retardant, reacting with polymers to form covalent bonds, thereby enhancing the flame retardancy of the polymers. It is commonly used with materials such as polyester resin, epoxy resin, unsaturated polyester, and polyurethane.
Additive Flame Retardants: It can work synergistically with other flame retardants, such as antimony trioxide, as an additive flame retardant in thermoplastics like polystyrene (PS), polypropylene (PP), polyethylene (PE), and ABS resins to improve their flame retardancy.
In addition, FHT-4 derivatives can be used in the flame retardant treatment of wires, cables, and wool fabrics.
Product Packaging & Storage


1. 25KG/bag, 40 bags/pallet, 20MT/20 'FCL
2. 500 kg kg/bag, 1 bag/pallet, 20 MT/20 FCL
FAQ
Q: Is TBPA Toxic?
A: Exposure to TBPA may cause symptoms such as coughing, sneezing, respiratory irritation, dermatitis, and eye irritation.
it reacts exothermically with water. While the reaction is generally slow, it can become vigorous if localized heating accelerates it.
Q: Is tetrabromophthalic anhydride exported as general goods or dangerous goods?
A: When it is exported as general goods, we can provide a cargo transportation appraisal report.
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