Subheading 292310: Quaternary Ammonium Salts and Hydroxides; Choline and its Sal … etc.
Subheading 292320: Lecithins and other Phosphoaminolipids, whether or not Chemic … etc.
Subheading 292330: Quaternary Ammonium Salts and Hydroxides; Tetraethylammonium … etc.
Subheading 292340: Quaternary Ammonium Salts and Hydroxides; Didecyldimethylammo … etc.
Subheading 292390: Quaternary Ammonium Salts and Hydroxides; whether or not Chem … etc.