ADK Stab AO-259 Antioxidant from Japan
ADK Stab AO-259, chemically 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate, serves as a primary antioxidant in engineering plastics like nylon and polyester for long-term heat stability. It is specifically named in HTS 2918.29.06.00 under carboxylic acids with phenol function, as a chemically defined compound per Chapter 29 notes.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit manufacturer's specification sheet verifying dibutyl-hydroxyphenyl structure to confirm HTS specificity
• Watch for anti-dusting agent additions (Chapter 29 note g); excess may reclassify as preparation
• Ensure drum packaging complies with UN hazmat if dust hazard present during import