Hexafluorobisphenol A (CAS 1477-55-0)
CAS-registered pure compound 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane, a monomer for high-Tg fluorene polymers in aerospace composites. Meets Chapter 29 definition as chemically defined halogenated phenol derivative.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mistaken for ketone-derived oxygen function compounds
The hexafluoroisopropylidene group resembles ketones, but phenolic OH dominates classification per numerical order rule.
If sugar ether derivatives structurally analogous
If chemically modified with sugar moieties, shifts to heading 2940 per exclusions.
If when pre-mixed as pesticide intermediate
Specific use formulations exclude from Chapter 29 per note 2(k).
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Related Products under HTS 2908.19.05.00
2,2-Bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane (Bisphenol AF)
A fluorinated bisphenol derivative used primarily as a monomer in high-performance polymers like fluorene-containing polyimides and epoxy resins. This chemically defined organic compound features two phenol groups with halogen (fluorine) substituents, falling under HTS 2908.19.05.00 as a halogenated derivative of phenols.
BPAF Monomer for Epoxy Resins
Specialty monomer 2,2-bis(4-hydroxyphenyl)hexafluoropropane specifically packaged for epoxy resin production in electronics encapsulation. Falls squarely under 2908.19.05.00 as a halogen-only substituted phenol derivative.
Bisphenol AF (99% Purity Technical Grade)
High-purity technical grade 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane used in synthesis of fluorinated polycarbonates for optical films. Classified under HTS 2908.19.05.00 as a pure halogenated phenol derivative per Chapter 29 note (a).