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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If tetraiodophthalic anhydride variant
Other specifically named halogenated phthalic anhydrides excluding tetrabromo classify in adjacent subheading.
If supplied as sugar ester derivative for specialty applications
Sugar esters and salts of organic acids fall under heading 2940, later in numerical order per classification note 3.
If for anti-dusting formulations with identification additives
Organic chemicals with added anti-dusting agents beyond Chapter 29 note (g) limits classify as chemical preparations.
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Import Tips & Compliance
• Declare CAS number 6322-99-2 on commercial invoice and ensure TSCA pre-manufacture notification if new chemical substance
• Verify bromination level through NMR or GC-MS analysis to distinguish from dibromophthalic derivatives under other subheadings
• Ship in UN-approved chemical containers with proper DOT hazard class 9 labeling for solid organic anhydrides
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.
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.
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.