Other
Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined: > Other
Duty Rate (from China)
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)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2923.90.01.00
Cetyltrimethylammonium Bromide (CTAB)
Cetyltrimethylammonium bromide is a quaternary ammonium salt used as a cationic surfactant in DNA extraction and as an antimicrobial agent. It falls under HTS 2923.90.0100 as a quaternary ammonium salt, chemically defined with a positively charged nitrogen atom bonded to four alkyl groups. This classification applies to separate chemically defined organic compounds per Chapter 29 notes.
Benzalkonium Chloride 50% Solution
Benzalkonium chloride is a quaternary ammonium compound widely used as a biocide and preservative in pharmaceuticals and cosmetics. This 50% aqueous solution qualifies under HTS 2923.90.0100 as a quaternary ammonium salt dissolved in water, permitted by Chapter 29 note (d) for chemically defined compounds. The solvent is solely for safety/transport without altering general use.
Didecyldimethylammonium Chloride (DDAC)
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.
Cetrimonium Chloride
Cetrimonium chloride, or hexadecyltrimethylammonium chloride, is a quaternary ammonium salt used in hair conditioners and antiseptics. It qualifies for HTS 2923.90.0100 as a separate chemically defined quaternary ammonium compound per Chapter 29 scope. No exclusions apply to this pure surfactant salt.
Tetrabutylammonium Bromide (TBAB)
Tetrabutylammonium bromide is a phase-transfer catalyst and ionic liquid precursor used in organic synthesis. This quaternary ammonium salt is classified under HTS 2923.90.0100 as a chemically defined organic compound with the characteristic quat structure. Chapter notes prioritize the last numerical heading for such salts.
Lecithin (Soybean-Derived Phosphatidylcholine)
Soy lecithin is a phosphoaminolipid mixture extracted from soybeans, used as an emulsifier in food and cosmetics. It falls under HTS 2923.90.0100 as 'other' lecithins and phosphoaminolipids, whether chemically defined or not, per the heading description. Chapter 29 includes such compounds explicitly.
Aliquat 336 (Tricaprylylmethylammonium Chloride)
Aliquat 336 is a quaternary ammonium chloride used as an extractant in metal separation and phase-transfer catalysis. As a long-chain alkyl quat salt, it is classified in HTS 2923.90.0100 for other quaternary ammonium salts. Meets Chapter 29's chemically defined organic compound criteria.
Choline Bitartrate Powder
Choline bitartrate is the bitartrate salt of choline, a quaternary ammonium compound used in dietary supplements for brain health. It classifies under HTS 2923.90.0100 as a quaternary ammonium salt; Chapter 29 note 3(C)(1) places organic salts with the organic compound. Chemically defined per chapter scope.
Tetramethylammonium Hydroxide (TMAH) 25% Solution
Tetramethylammonium hydroxide is a quaternary ammonium hydroxide used as a developer in semiconductor manufacturing and as a strong organic base. The 25% aqueous solution is classified under HTS 2923.90.0100 per Chapter 29 notes covering quaternary ammonium hydroxides and water-dissolved forms. It remains a separate chemically defined compound.
Choline Chloride Feed Grade
Choline chloride is a quaternary ammonium salt essential as a nutritional supplement in animal feed to prevent fatty liver disease. This feed-grade powder falls under HTS 2923.90.0100 as a chemically defined quaternary ammonium salt with an added anticaking agent permitted by Chapter 29 note (f). It meets the chapter's scope for separate organic compounds.