2931.49.00.10 - 2-Amino-4-[hydroxy(methyl)phosphonoyl] butanoic acid (glufosinate) and its salts and esters

This classification encompasses organic compounds that contain both phosphorus and at least one other non-metallic element or metallic element linked through a covalent bond. Specifically, it covers organo-phosphorus derivatives that are not halogenated, and within this group, further categorizes "other" compounds not falling into more specific subheadings. A prime example within this "other" category is 2-Amino-4-[hydroxy(methyl)phosphonoyl] butanoic acid, commonly known as glufosinate, along with its various salts and esters. These compounds are often utilized for their herbicidal properties.

To differentiate this specific classification from its siblings, it is important to note that other categories at the same level focus on distinct types of organo-phosphorus compounds. For instance, sibling codes may cover phosphoramidocyanidates, phosphonites and their esters, or other specific phosphinates and phosphonates like butyl methylphosphinate or bis(1-methylpentyl) methylphosphonate. Furthermore, the widely recognized herbicide N-(Phosphonomethyl) glycine, or glyphosate, and its derivatives are classified separately under 2931.49.00.20, highlighting the specific structural and chemical distinctions that HTS classification relies upon.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification at this level is therefore determined by the specific chemical identity of the substance, with glufosinate and its salts and esters being the defining examples. Importers and exporters should consult detailed chemical specifications to ensure accurate classification, paying close attention to the presence of the phosphonoyl group and the specific amino acid structure that characterizes glufosinate.