2921.43.08.00 - 4-Chloro-o-toluidine and hydrochloride; 5-Chloro-o-toluidine; 6-Chloro-2-toluidine-4-sulfonic acid; 4-Chloro-α,α,α-trifluoro-o- toluidine; 2,6-Dichloro-m-toluidine;N,N- Dimethyl-p-toluidine;N-Ethyl-N-benzyl-m-toluidine; andN-Ethyl-o-toluidine

This HTS classification, 2921.43.08.00, encompasses a specific group of toluidine derivatives and their hydrochloride salts. These compounds are characterized by the presence of a methyl group and an amine group attached to a benzene ring, with additional specific substituents such as chlorine atoms, trifluoromethyl groups, or nitro groups. The list includes substances like 4-Chloro-o-toluidine and its hydrochloride salt, 5-Chloro-o-toluidine, 6-Chloro-2-toluidine-4-sulfonic acid, 4-Chloro-α,α,α-trifluoro-o-toluidine, 2,6-Dichloro-m-toluidine, N,N-Dimethyl-p-toluidine, N-Ethyl-N-benzyl-m-toluidine, and N-Ethyl-o-toluidine.

This category is distinguished from its sibling categories by the precise combination and position of the substituents on the toluidine molecule. For instance, sibling codes 2921.43.04.00 and 2921.43.19.00 cover different chlorinated and trifluoromethylated toluidines based on their specific isomerism and substituent placement. Similarly, codes like 2921.43.15.00 (Trifluralin) and 2921.43.22.00 represent more complex toluidine derivatives with distinct substituent patterns and often specialized uses, such as herbicides. The key to classifying within this group lies in meticulously matching the chemical name and structure to the specific entries provided.

As this classification represents a leaf node, there are no further subdivisions. Therefore, classification under 2921.43.08.00 relies entirely on accurately identifying the described chemical compound from the provided list, ensuring it is not more appropriately classified under a sibling category. The presence and location of chlorine, trifluoromethyl, or sulfonic acid groups, along with the specific alkyl or benzyl substitutions on the nitrogen atom, are the critical determinative factors for accurate customs declaration.