4,4-Bis(4-hydroxyphenyl) pentanoic acid
This is a specific carboxylic acid with phenol function, explicitly named in HTS 2918.29.3900. It features two 4-hydroxyphenyl groups attached to the 4-position of pentanoic acid, classifying it under carboxylic acids with phenol function but without other oxygen functions. Used primarily as a pharmaceutical intermediate.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing additional oxygen functions beyond phenol
Products with other oxygen groups like ethers or esters fall under 'other carboxylic acids with additional oxygen function' per chapter notes.
If used as vitamin E synthesis intermediate and imported for that purpose
This compound relates to tocopherol production; chapter notes prioritize later headings for such derivatives.
If imported as mixture with solvents for safety/transport
Chapter note (e) allows solutions in solvents for transport to classify as preparations, not pure compounds.
Not sure which classification is right?
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 Certificate of Analysis (CoA) confirming chemical identity and purity to avoid misclassification
• Ensure proper Hazard Communication labeling per GHS for phenolic carboxylic acids during customs clearance
• Verify REACH compliance if from EU; common pitfall is missing stability data for transport
Related Products under HTS 2918.29.39.00
3,5,6-Trichlorosalicylic acid
A halogenated derivative of salicylic acid, specifically listed under HTS 2918.29.3900 as a carboxylic acid with phenol function. The trichloro substitution on the aromatic ring qualifies it under halogenated phenolic carboxylic acids without other oxygen functions. Commonly used in dye synthesis and pharmaceutical intermediates.
Bisphenol A bis(4-hydroxyphenyl)propane derivative acid
A structural analog of 4,4-bis(4-hydroxyphenyl)pentanoic acid used in polymer synthesis, classified under the specific naming in HTS 2918.29.3900. It maintains the phenolic carboxylic acid structure without additional oxygen functions. Applied in specialty resin production.
Technical grade 3,5,6-Trichlorosalicylic acid 98%
Industrial-grade 3,5,6-trichlorosalicylic acid with 98% purity and minor impurities, still classified under HTS 2918.29.3900 per chapter note (a) allowing impurities. Used in azo dye coupler production and herbicide intermediates.
4,4-Bis(4-hydroxyphenyl)pentanoic acid stabilized crystals
Crystalline form of 4,4-bis(4-hydroxyphenyl)pentanoic acid with added stabilizer for transport, classified under HTS 2918.29.3900 per chapter note (f). The stabilizer prevents degradation without altering use suitability.