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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing heterocyclic impurities altering structure
Presence of non-carbon heteroatoms may push to organo-heterocyclic compounds in heading 2933.
If esterified with carboxylic acids
Esters of polyphenols classify with the acid-function compound last in numerical order per Chapter 29 note on esters.
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Import Tips & Compliance
• Submit impurity profile to confirm <2% non-phenol content per Chapter 29 note (a); Label as '4,4''-Biphenol' exactly matching tariff description; Obtain REACH/ TSCA pre-registration for US import compliance
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'-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.