High-Purity 4,4'-Biphenol Flakes
High-purity 4,4'-Biphenol in flake form (>99.5% purity) is a key polyphenol for advanced polymer production, specifically named in HTS 2907.29.15.00. It serves as a monomer in polycarbonate resins and flame retardants. Meets Chapter 29 requirements for separate chemically defined organic compounds without disqualifying impurities.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in aqueous solution for safe transport
Chapter 29 note (d) allows water-dissolved chemically defined compounds, but specific subheadings may apply based on concentration.
If pre-polymerized into low molecular weight resin
Partial polymerization shifts classification from Chapter 29 monomers to Chapter 39 polymers.
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Import Tips & Compliance
• Include HPLC purity certificate showing >99% to affirm chemical definition; Use UN-approved packaging for phenolic compounds to meet transport safety notes (e); Watch for anti-dumping duties on phenol derivatives from certain origins
Related Products under HTS 2907.29.15.00
4,4'-Biphenol (CAS 92-88-6)
4,4'-Biphenol is a polyphenolic compound consisting of two hydroxyphenyl groups linked by a biphenyl bond, classified under HTS 2907.29.15.00 as a specific other polyphenol. It is a white crystalline solid used primarily as a chemical intermediate in organic synthesis. This pure, chemically defined organic compound falls squarely within Chapter 29 heading for polyphenols.
4,4'-Biphenol Technical Grade Powder
Technical grade 4,4'-Biphenol powder (98-99% purity) is classified under HTS 2907.29.15.00 as the named polyphenol, a chemically defined compound per Chapter 29. Used in antioxidant formulations and liquid crystal production. Minor impurities do not alter its classification as a separate organic compound.
4,4'-Dihydroxybiphenyl Crystals
4,4'-Dihydroxybiphenyl (synonym for 4,4'-Biphenol) in crystalline form is specifically enumerated under HTS 2907.29.15.00 within polyphenols. This chemically defined bis-phenol is essential for epoxy resin hardeners and pharmaceutical intermediates. Fits Chapter 29 scope excluding only listed non-applicable goods.
Stabilized 4,4'-Biphenol for Transport
4,4'-Biphenol with added stabilizer for safe transport, explicitly allowed under HTS 2907.29.15.00 and Chapter 29 note (f). Remains classified as the named polyphenol for general chemical use, not specific applications. Used in high-performance plastics manufacturing.