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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing direct organo-metal bonds
Organo-inorganic compounds with metal-carbon links classify in 2931, but this pure organic anhydride stays in Chapter 29 subchapter.
If for saturated polycarboxylic acid anhydrides
Saturated versions without aromatic rings fall under earlier oxygen-function headings; aromatic nature dictates 2917 placement.
If diluted with anticaking agents beyond Chapter 29 limits
Excess additives rendering it suitable for specific uses shift to chemical preparations in 3824.
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Import Tips & Compliance
• Label containers with GHS corrosive pictograms; obtain TSCA certification for US entry; avoid bulk import without stabilizer to prevent sublimation
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.
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.