9902.08.78 - Solvent red 135 (8,9,10,11-Tetrachloro-12H-isoindolo[2,1-a]perimidin-12-one) (CAS No. 20749-68-2) (provided for in subheading 3204.19.25)

This HTS category, 9902.08.78, specifically addresses Solvent Red 135, identified by its chemical name 8,9,10,11-Tetrachloro-12H-isoindolo[2,1-a]perimidin-12-one and its Chemical Abstracts Service (CAS) number 20749-68-2. This classification falls under Chapter 99, which pertains to temporary legislation, modifications under trade agreements, and additional import restrictions proclaimed under Section 22 of the Agricultural Adjustment Act. The inclusion of "provided for in subheading 3204.19.25" indicates that while this specific provision is temporary or under special regulation, the underlying product is a synthetic dye.

As a leaf node within the HTS structure, 9902.08.78 does not have further subdivisions. Its existence as a specific HTS code signifies a distinct regulatory treatment, likely due to trade policy, temporary measures, or specific import controls applied to this particular chemical compound. Unlike its sibling categories within Chapter 99 which might cover other temporary measures or specific trade restrictions on different goods, this code is precisely targeted at Solvent Red 135.

The primary purpose of this classification is to identify and manage the import of Solvent Red 135 under specific, potentially time-limited, customs provisions. Importers must be aware that the conditions and duties applicable to this substance may differ from those under its primary classification in Chapter 32 (Dyes and pigments), due to the overarching regulations governed by Chapter 99. This detailed HTS code ensures that this specific dye is subject to any unique import requirements or limitations in place.