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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for pyromellitic dianhydride isomers
Similar dianhydrides without fluoroisopropylidene classify separately; this specific structure has its dedicated subheading.
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Import Tips & Compliance
• Provide NMR spectrum in documentation for purity verification; use nitrogen-purged containers; comply with EPA pre-manufacture notice if resynthesizing
Related Products under HTS 2917.39.12.00
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.
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.