Didecyldimethylammonium Chloride (DDAC) from Japan
DDAC is a cationic surfactant widely used as a disinfectant and biocide in industrial cleaning formulations. It qualifies under heading 3402 by producing stable emulsions and lowering water surface tension per the technical test. Falls in 3402.41.90.00 as other cationic agents beyond those specified.
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 EPA registration if used as disinfectant to comply with pesticide import rules
• Document concentration and test results proving organic surface-active agent status
• Label clearly as cationic to prevent reclassification into anionic or nonionic categories