2904.99.20.00 - Nitrotoluenesulfonic acids

This HTS category, 2904.99.20.00, specifically classifies nitrotoluenesulfonic acids. These are organic compounds derived from toluene that have undergone both nitration (introduction of nitro groups, -NO2) and sulfonation (introduction of sulfonic acid groups, -SO3H). The presence of both functional groups is key to this classification.

Within the broader category of sulfonated, nitrated or nitrosated derivatives of hydrocarbons, this subheading stands apart by its specific chemical structure. While sibling categories might cover other nitrated derivatives like specific halonitrobenzenes or dinitrostilbene disulfonic acid, this node is exclusively for compounds containing both nitro and sulfonic acid functionalities on a toluene backbone. The "Other" designation within the parent "Other" level signifies that these are not specifically enumerated elsewhere at a more granular level.

As a leaf node, 2904.99.20.00 has no further subcategories. Therefore, classification within this code relies on accurately identifying the chemical composition as a nitrotoluenesulfonic acid. Importers and exporters should ensure that their product's chemical analysis confirms the presence and combination of these functional groups on a toluene structure to ensure correct classification.