Didecyldimethylammonium Chloride (DDAC) from China
Didecyldimethylammonium chloride is a quaternary ammonium compound serving as a broad-spectrum disinfectant and wood preservative. As a pure, chemically defined salt, it is classified in HTS 2923.90.0100 under the quaternary ammonium salts heading. Chapter notes confirm inclusion for separate organic compounds.
Duty Rate — China → United States
43.7%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• EPA registration required if for pesticide use; include product label and efficacy data
• Purity >95% keeps it in Ch. 29; lower grades risk Chapter 38 reclassification
• Declare as non-hazardous if stabilized properly to minimize shipping costs