Nylon 6,6 Polymerization Salt (AH Salt) from Japan
AH Salt is the industrial name for hexamethylenediamine adipate used directly in nylon 6,6 manufacturing, explicitly derived from adipic acid and hexamethylenediamine. It meets HTS 2921.22.1000 criteria as an acyclic polyamine salt with adipic acid origin. Shipped as 60-70% aqueous solutions for polymerization processes.
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
• Include polymerization process specifications showing adipic acid molar equivalence in documentation
• Monitor water content (typically 30-40%) as excessive dilution may trigger Chapter 29 note (e) solvent restrictions
• Obtain REACH/ TSCA pre-registration for EU/US chemical compliance before importation