Other
Oxygen-function amino-compounds: > Amino-acids, other than those containing more than one kind of oxygen function, and their esters; salts thereof: > Other: > Other: > Amino acids: > Other amino acids > 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 2922.49.49.50
L-Tyrosine
L-Tyrosine is a non-essential amino acid with a phenolic hydroxyl group, classified as an oxygen-function amino-acid under HTS 2922.49.4950. It serves as a precursor for neurotransmitters like dopamine and is used in nutritional supplements and pharmaceuticals.
L-Phenylalanine
L-Phenylalanine is an essential amino acid featuring a benzyl side chain, falling under oxygen-function amino-acids in HTS 2922.49.4950. It's widely used in sports nutrition, PKU management, and as a precursor for aspartame sweetener.
DL-Methionine
DL-Methionine is a synthetic racemic amino acid with a thioether side chain but classified here due to its amino-carboxylic acid structure under HTS 2922.49.4950. Primarily used as an essential amino acid supplement in animal feed and human nutrition.
L-Tryptophan
L-Tryptophan is an essential amino acid with an indole ring containing oxygen-function characteristics, classified under HTS 2922.49.4950. Used in sleep supplements, mood regulation products, and as a precursor for serotonin.
L-Cysteine Hydrochloride Monohydrate
Despite being a salt, L-Cysteine Hydrochloride Monohydrate qualifies as an oxygen-function amino-acid under HTS 2922.49.4950 when not separately provided for. Used as a dough conditioner in baking and antioxidant in cosmetics.
Beta-Alanine
Beta-Alanine is a non-proteinogenic amino acid used in performance supplements like carnosine precursors, classified under other amino acids in HTS 2922.49.4950. Its beta-positioned amino group distinguishes it from alpha-amino acids.
L-Arginine Base
L-Arginine is a conditionally essential amino acid with guanidino group, falling under oxygen-function amino-acids in HTS 2922.49.4950. Widely used in nitric oxide boosters, wound healing formulations, and urea cycle support.
L-Lysine Monohydrochloride
L-Lysine HCl is the hydrochloride salt of essential amino acid lysine, provided for under other amino acids in HTS 2922.49.4950. Essential for animal feed (90% usage) and human nutrition products.
L-Histidine
L-Histidine is an essential amino acid featuring imidazole ring, classified as oxygen-function amino-acid under HTS 2922.49.4950. Used in allergy medications, metal chelation, and buffering agents.
L-Proline
L-Proline is a non-essential amino acid with pyrrolidine ring, oxygen-function amino-acid under HTS 2922.49.4950. Key in collagen synthesis supplements and pharmaceutical intermediates.