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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for generic polyphenols not specifically named
Tariff structure prioritizes specific 4,4'-Biphenol subheading over general 'other' per numerical order rule.
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The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide melting point (165-170°C) and NMR spectrum for identity confirmation; Ensure stabilizer-free unless necessary for transport per note (f); Avoid bulk packaging over 25kg to minimize spill risks during inspection
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.
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.
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.
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.