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 2942.00.50.00
Anhydrotetracycline Hydrochloride
Anhydrotetracycline hydrochloride is a chemically defined organic compound derived from tetracycline antibiotics, classified under HTS 2942.00.50.00 as 'other' organic compounds not specifically covered elsewhere in Chapter 29. It contains complex heterocyclic structures with nitrogen and oxygen functions, fitting the chapter's scope for separate organic compounds.
N-Acetyl-DL-tryptophan
N-Acetyl-DL-tryptophan is an acetylated derivative of the amino acid tryptophan, classified under HTS 2942.00.50.00 as an 'other' organic compound. This synthetic amino acid derivative features both amine and carboxylic acid functions with an indole ring, falling outside specific amino acid headings.
6-Aminopenicillanic Acid
6-Aminopenicillanic acid (6-APA) is the core nucleus for semi-synthetic penicillin antibiotics, classified under HTS 2942.00.50.00 as 'other' organic compounds. This beta-lactam compound serves as a key pharmaceutical intermediate with a characteristic four-membered ring structure.
Saccharin Impurity A (o-Sulfamoylbenzoic Acid)
o-Sulfamoylbenzoic acid, known as Saccharin Impurity A, is a key intermediate in saccharin synthesis and a chemically defined organic compound under HTS 2942.00.50.00. It features both sulfonic acid and carboxylic acid functionalities on a benzene ring.
4-Nitrophenyl Chloroformate
4-Nitrophenyl chloroformate is a reactive chloroformate ester used in peptide synthesis, classified under HTS 2942.00.50.00 as 'other' organic compounds. This compound features both nitroaromatic and chloroformate functionalities essential for bioconjugation applications.
Benzoyl Peroxide (Pure)
Benzoyl peroxide in pure form (>98%) is classified under HTS 2942.00.50.00 as an 'other' organic peroxide not covered by specific bleaching agent provisions. This diacyl peroxide serves as a free radical initiator in polymer chemistry.
Triphenylmethyl Chloride (Trityl Chloride)
Triphenylmethyl chloride (trityl chloride) is a protecting group reagent for nucleosides and peptides, classified under HTS 2942.00.50.00 as 'other' organic compounds. This triarylmethyl halide is essential in oligonucleotide synthesis.
Di-tert-butyl Dicarbonate (Boc2O)
Di-tert-butyl dicarbonate (Boc anhydride) is a protecting agent for amines in peptide synthesis, classified under HTS 2942.00.50.00 as 'other' organic compounds. This mixed anhydride features carbonate and carboxylate functionalities.
Fluorenylmethyloxycarbonyl Chloride (Fmoc-Cl)
9-Fluorenylmethyloxycarbonyl chloride (Fmoc-Cl) is a protecting group reagent for solid-phase peptide synthesis, classified under HTS 2942.00.50.00. This chloroformate derivative features a fluorenyl protecting moiety.
2-Cyanoguanidine (Dicyandiamide)
2-Cyanoguanidine, also known as dicyandiamide, is an organic compound used as a curing agent for epoxies, classified under HTS 2942.00.50.00. This compound features both nitrile and guanidine functionalities.
Meldrum's Acid
Meldrum's acid (2,2-dimethyl-1,3-dioxane-4,6-dione) is a cyclic diester used in organic synthesis, classified under HTS 2942.00.50.00 as 'other' organic compounds. This highly acidic beta-diketone equivalent features a six-membered heterocyclic ring.
Lawesson's Reagent
Lawesson's reagent (2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide) is a thionation agent, classified under HTS 2942.00.50.00. This organophosphorus dithio compound converts carbonyls to thiocarbonyls.
Burgess Reagent
Burgess reagent (methyl N-(triethylammoniumsulfonyl)carbamate) is used for alkene-forming eliminations, classified under HTS 2942.00.50.00. This inner salt features sulfonamide and carbamate functionalities.
Corey-Kim Reagent Intermediate (N-Chlorosuccinimide)
N-Chlorosuccinimide (NCS) is a chlorinating and oxidizing agent used in the Corey-Kim reaction, classified under HTS 2942.00.50.00. This N-haloimide features a succinimide ring with active chlorine.
Dess-Martin Periodinane
Dess-Martin periodinane (1,1,1-triacetoxy-1,1-dihydro-1,2-benziodoxol-3(1H)-one) is an organoiodine oxidant for alcohols, classified under HTS 2942.00.50.00. This hypervalent iodine compound features a unique benziodoxole structure.