9902.08.63 - [1,2,3,4,8,9,10,11,15,16,17,18,22,23,25 - Pentadecachloro - 29,31-dihydro-5H, 26H-phthalocyaninato (2-) -κ2 N29, N31] copper (CAS No. 1328-53-6) (provided for in subheading 3204.17.90)

This HTS category, 9902.08.63, specifically covers a highly complex chemical compound: Pentadecachloro-29,31-dihydro-5H,26H-phthalocyaninato(2-)κ2 N29,N31 copper, also known by its CAS number 1328-53-6. This particular copper phthalocyanine derivative is a specialized pigment or dye precursor, identified by its extensive chlorination and unique structural configuration. Its inclusion within Chapter 99 signifies its treatment under special provisions, temporary legislation, or specific trade agreement modifications, rather than its general classification in the core chapters of the HTS.

As this is a leaf node within the HTS database, it represents a very specific item and does not have further subdivisions. Its classification is distinguished from other entries by its precise chemical identity, its role as a precursor, and its specific designation for temporary or special treatment. While other categories in Chapter 32, for instance, might cover broader classes of dyes and pigments, this code pinpoints a particular compound subject to specific import regulations or tariff treatments outlined by trade agreements or temporary legislation. Users should refer to the associated notes for Chapter 99 and any specific proclamations related to this HTS code for complete understanding of its application and any associated duties or restrictions.