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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a salt such as L-Tyrosine hydrochloride
Amino acid salts are classified separately under 2922.50, based on chapter note for salts of organic compounds.
If when containing more than one kind of oxygen function beyond the amino acid structure
Chapter notes exclude amino acids with multiple oxygen functions from 2922, directing to later headings like 2936.
If esterified, such as tyrosine methyl ester
Esters of amino acids fall under heading 2940 per chapter provisions for sugar ethers/esters and salts.
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Import Tips & Compliance
• Verify purity certificates (typically 98%+ for USP grade) to meet FDA food/supplement import standards
• Include Certificate of Analysis (CoA) showing optical purity (L-form vs DL) to avoid reclassification
• Label as 'food grade' or 'pharma grade' accurately to prevent CBP scrutiny on end-use claims
Related Products under HTS 2922.49.49.50
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.