2908.99.40.00 - Dinitrobutylphenol and its salts

This HTS category, 2908.99.40.00, specifically classifies dinitrobutylphenol and its salts. These are organic chemical compounds that are derivatives of phenol, characterized by the presence of two nitro groups and a butyl substituent on the phenol ring, or their corresponding salt forms. This designation applies to compounds where the nitro and butyl groups are attached to the phenol structure in a manner not covered by more specific subheadings within the 2908 chapter.

Unlike sibling categories such as p-Nitrophenol or various nitrocresols, this subheading targets a specific combination of functional groups. While other nitrophenols are classified based on the number and position of nitro groups and their parent structure (phenol vs. cresol), 2908.99.40.00 is reserved for dinitrobutylphenol, distinguishing it by the presence of both two nitro groups and a butyl chain. The "Other" classifications at higher levels indicate that this subheading captures those nitrated phenol derivatives not otherwise specifically enumerated.

As this is a leaf node within the HTS structure, there are no further subdivisions. Therefore, accurate classification under 2908.99.40.00 relies on confirming the chemical identity of the imported merchandise as dinitrobutylphenol or its salts, ensuring it meets the criteria of being a nitrated phenol derivative and is not specifically listed under a more precise subheading. This ensures the correct application of duty rates and trade statistics for these specialized chemical compounds.