4,5,6,7-Tetrabromophthalic Anhydride from Canada
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.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• 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