4,5,6,7-Tetrabromophthalic Anhydride
Pure 4,5,6,7-tetrabromophthalic anhydride (CAS 6322-99-2) used in reactive flame retardant synthesis for unsaturated polyester resins. Meets HTS 2917.39.17.00 as the specifically enumerated tetrabrominated aromatic anhydride derivative. Provides thermal stability and bromine source for covalent flame retardant bonding.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If phthalic anhydride without tetrabromo substitution
Unsubstituted or differently halogenated phthalic anhydrides fall under 'other' aromatic polycarboxylic anhydrides.
If imported as halohydrin precursor rather than cyclic anhydride
Halogenated derivatives of acyclic alcohols classify earlier in Chapter 29 under heading 2903.
If when antioxidant-stabilized for rubber compounding
Mixtures of organic chemicals with rubber accelerators or antioxidants classify in heading 3812.
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Import Tips & Compliance
• Include Certificate of Analysis specifying >99% purity and isomer confirmation to prevent reclassification as 'other' aromatic anhydrides
• Comply with EU REACH Annex XVII restrictions on brominated flame retardants for transshipment goods
• Use secondary containment packaging per IATA dangerous goods regulations for air import
Related Products under HTS 2917.39.17.00
Tetrabromophthalic Anhydride
Tetrabromophthalic anhydride is a halogenated aromatic polycarboxylic acid anhydride used primarily as a reactive flame retardant intermediate in polymer production. It falls under HTS 2917.39.17.00 as a specifically named derivative of aromatic polycarboxylic acids with bromine substitution. The compound's structure features a phthalic anhydride core with four bromine atoms, meeting Chapter 29 note requirements for halogenated derivatives.
TBPA Flame Retardant Intermediate
TBPA (tetrabromophthalic anhydride) serves as a key reactive intermediate for synthesizing brominated polyester resins and polyurethane flame retardants. Classified under HTS 2917.39.17.00 due to its specific chemical identity as a tetrabrominated phthalic anhydride. Used in electronics and construction materials for high-temperature flame resistance.
Flame Retardant TBPA Anhydride
Industrial-grade tetrabromophthalic anhydride for manufacturing brominated epoxy resins used in printed circuit boards. Specifically classified under HTS 2917.39.17.00 as the named tetrabromo derivative of phthalic anhydride. Provides high bromine content (68%) for effective flame suppression.