9902.03.73 - 4-Amino-3-methylbenzenesulfonic acid (CAS No. 98-33-9) (provided for in subheading 2921.43.90)

This HTS code, 9902.03.73, specifically covers 4-Amino-3-methylbenzenesulfonic acid, identified by CAS No. 98-33-9. This chemical compound is a specific sulfonated aromatic amine. Its inclusion within Chapter 99 signifies a temporary modification or restriction related to its import, often stemming from trade agreements or agricultural adjustment legislation. It is important to note that while the chemical itself is provided for under subheading 2921.43.90 (which generally covers other aromatic amines), this specific 9900 series code indicates a distinct treatment for import purposes under current regulations.

As this is a leaf node within the HTS database, there are no further subcategories to explore under this specific code. The classification is precise, focusing on the identity of the chemical compound and the special provisions applied to it. Therefore, distinguishing it from sibling categories requires understanding the broader scope of Chapter 99, which houses temporary legislation and special provisions distinct from the permanent, goods-based classifications found in chapters 1 through 98. Each code within Chapter 99 is designed to address unique, often time-sensitive, import or export circumstances.