Other amino acids
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
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
DL-Methionine
DL-Methionine is a synthetic essential amino acid used primarily as a nutritional supplement in animal feed to promote growth and health. It falls under HTS 2922.49.49 as an other amino acid with oxygen-function (carboxyl group) and no more than one kind of oxygen function. This classification applies to its pure chemical form, separate from mixtures or salts.
L-Valine Feed Grade
L-Valine feed grade is a branched-chain essential amino acid supplementing deficient diets in poultry and swine production. HTS 2922.49.49 covers this pure amino acid with single carboxyl oxygen function. Typically 98.5% purity for agricultural applications.
DL-Alanine
DL-Alanine is the racemic mixture of alanine used in biochemical research, cell culture media, and as a food additive. Falls under HTS 2922.49.49 as other amino acids with oxygen-function amino structure. Non-essential amino acid for synthetic biology applications.
L-Serine
L-Serine is a polar amino acid used in cosmetics, pharmaceuticals, and as a precursor for neurotransmitters. Classified under HTS 2922.49.49 as an oxygen-function amino acid (additional hydroxyl group permitted). High purity for biotech and skincare formulations.
L-Aspartic Acid
L-Aspartic Acid serves as a neurotransmitter precursor and aspartame intermediate in food and pharma industries. Falls under HTS 2922.49.49 as other amino acid with single dicarboxylic oxygen function allowed. Used in sweeteners and infusions.
L-Proline
L-Proline is an imino acid critical for collagen synthesis, used in wound healing supplements and biotech. HTS 2922.49.49 includes this cyclic secondary amine amino acid with oxygen function. Essential for protein structure research.
L-Glutamic Acid
L-Glutamic Acid is the precursor to MSG, used in neurobiology research and seasonings. HTS 2922.49.49 for pure dicarboxylic amino acid. Key excitatory neurotransmitter.
L-Histidine
L-Histidine essential amino acid for histamine production and metal chelation in supplements. HTS 2922.49.49 despite imidazole ring, classified by amino acid function. Used in allergy research and nutrition.
L-Lysine Base
L-Lysine base essential amino acid for swine/poultry feed, preventing deficiency diseases. HTS 2922.49.49 for pure free base form (most imported as sulfate salt). 98.5% min purity specification.
L-Cysteine
L-Cysteine free base amino acid used in bakery dough conditioning and antioxidant supplements. HTS 2922.49.49 as oxygen-function amino acid with thiol group. Pharmaceutical and food processing applications.
L-Arginine
L-Arginine semi-essential amino acid for nitric oxide production in cardiovascular supplements. HTS 2922.49.49 as basic amino acid with guanidino group. Popular in bodybuilding and erectile dysfunction formulas.
L-Threonine USP Grade
L-Threonine USP is a high-purity enantiomer of the essential amino acid used in pharmaceuticals, supplements, and livestock nutrition. Classified under HTS 2922.49.49 as an other oxygen-function amino acid in pure form. Meets USP standards for human and animal consumption.
L-Isoleucine Pharmaceutical Grade
L-Isoleucine pharmaceutical grade is a branched-chain amino acid for parenteral nutrition and muscle recovery supplements. HTS 2922.49.49 applies to this pure enantiomer with single oxygen function. Meets EP/USP monographs for IV infusion use.
Beta-Alanine
Beta-Alanine is a non-proteinogenic amino acid used in sports nutrition for carnosine synthesis and performance enhancement. HTS 2922.49.49 covers this beta-positioned oxygen-function amino acid. Popular in pre-workout supplements.
DL-Tryptophan
DL-Tryptophan racemic mixture used as sleep aid precursor and animal feed supplement post-1989 EMS outbreak clearance. HTS 2922.49.49 for other amino acids despite indole ring. Regulated for human consumption purity.