4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride) 98% purity
This is a high-purity aromatic polycarboxylic anhydride featuring a hexafluoroisopropylidene bridge between two phthalic anhydride units, classified under HTS 2917.39.12.00 as a specific derivative of aromatic polycarboxylic acids. It serves as a key monomer in producing high-performance fluorinated polyimides for advanced materials.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a partially hydrolyzed diacid form
Hydrolyzed forms may classify as aromatic ketones or quinones under earlier chapter headings per classification note prioritizing later numerical order.
If supplied as a solution in solvent for safe transport
Solutions in solvents for safety/transport fall under mixtures of Chapter 38 if not meeting Chapter 29 note (e) criteria for general use.
If part of a heterocyclic nucleotide derivative set
If chemically modified into a heterocyclic structure beyond simple anhydride, it shifts to nucleic acid derivatives in heading 2934.
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Import Tips & Compliance
• Verify chemical purity and provide Certificate of Analysis (CoA) from manufacturer; ensure packaging complies with UN hazardous material regulations for anhydrides; declare exact CAS number 1107-00-0 to avoid reclassification
Related Products under HTS 2917.39.12.00
6FDA Monomer -- 4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride)
Known as 6FDA, this fluorinated dianhydride is a chemically defined aromatic polycarboxylic anhydride under HTS 2917.39.12.00, used primarily in synthesizing polyimides with exceptional thermal and chemical resistance. Its specific structure with fluorine substitution distinguishes it from other aromatic anhydrides.
HFBPA Anhydride -- 99% Technical Grade
HFBPA, or 4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride), is a technical-grade aromatic dianhydride explicitly listed in HTS 2917.39.12.00 for its role in fluoropolymer production. It provides optical transparency and low dielectric constants in resulting polyimide materials used in semiconductors.
Fluorinated Dianhydride 4,4'-HFIPA
4,4'-HFIPA is the standard industry name for 4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride), a separate chemically defined compound under HTS 2917.39.12.00. It is indispensable for gas separation membranes and high-temperature coatings due to its fluorinated structure.
2,2-Bis(3,4-dicarboxyphenyl)hexafluoropropane Dianhydride
This systematic name refers to 4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride), a specific aromatic anhydride in HTS 2917.39.12.00, valued for producing colorless polyimides in optical applications. Its chemical purity ensures consistent polymerization properties.