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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered primarily as organo-sulfur compound
Chapter notes direct organo-sulfur compounds containing metals/nonmetals to 2930, though amino acid function prevails.
If DL-Methionine sodium salt or hydroxy analog
Salts and derivatives shift to 2922.50 per classification rules for salts.
If when pre-formulated into mineral feed supplements
Fertilizer/fertilizer mixtures containing amino acids move to Chapter 31.
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Import Tips & Compliance
• Include AAFCO certification for animal feed grade to meet agricultural import requirements
• Declare exact DL vs L-form ratio as racemic forms have different bioavailability claims
• Ensure sulfur content <0.5% impurities to avoid hazardous material declarations
Related Products 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.
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.