2,2-Bis(3,4-dicarboxyphenyl)hexafluoropropane Dianhydride from Japan
4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride) is a fluorinated aromatic dianhydride used in producing colorless polyimides for optical applications. It is a separate chemically defined compound, and its classification under heading 29.17 is based on its structure as an aromatic polycarboxylic anhydride.
Duty Rate — Japan → Canada
0%
Import Tips
• Ensure the product is a separate chemically defined compound; the high purity supports this
• The fluorinated nature does not remove it from heading 29.17, as it is a derivative of an aromatic polycarboxylic acid
• Provide the CAS number (1107-00-2) on the commercial invoice