2918.99.20.50 - Other

This HTS classification, 2918.99.20.50, encompasses a broad residual category for carboxylic acids with an additional oxygen function and their derivatives that are classified as aromatic pesticides but do not fall under the more specific subcategories provided. It serves as a catch-all for aromatic compounds containing a carboxylic acid group or its anhydride, halide, peroxide, or peroxyacid forms, which are primarily used for pest control purposes.

This category is distinct from its siblings, 2918.99.20.10 and 2918.99.20.15, which specifically enumerate 2,4-Dichlorophenoxyacetic acid, its salts and esters, and 2-Methyl-4-chlorophenoxyacetic acid, respectively. Therefore, any aromatic pesticidal carboxylic acid derivative that is not one of these explicitly named substances would be directed to this residual "Other" classification.

As this classification is a leaf node, there are no further subcategories. Classification into 2918.99.20.50 is determined by the absence of specific listing within preceding categories at the same level, provided the chemical structure meets the broader criteria of aromatic carboxylic acids with additional oxygen function and its derivatives used as pesticides. Practical classification will rely on identifying the chemical identity and intended pesticidal application.