9902.08.50 - Mixtures of Reactive Blue 19 (1-Amino-9,10-dihydro-9,10-dioxo-4-[[3-[[2-(sulfooxy)ethyl]sulfonyl] phenyl] amino]-2-anthracenesulfonic acid, sodium salt (1:2)) (CAS No. 2580-78-1); Reactive Blue 187 (1,1'-[(6,13-dichloro-4,11-disulfo-3,10-triphenodioxazinediyl) bis [imino-2,1-ethanediylimino[6-[(2,5-disulfophenyl) amino]-1,3,5-triazine-4,2-diyl]]] bis [3-carboxy-, bis(inner salt), hexasodium salt ) (CAS No. 79771-28-1) (provided for in subheading 3204.16.30).

This HTS category, 9902.08.50, specifically covers certain mixtures of two named reactive dyes: Reactive Blue 19 and Reactive Blue 187. These are complex chemical compounds identified by their specific chemical names and CAS Registry Numbers, indicating a precise chemical composition. The inclusion of these specific dye mixtures under this temporary legislation heading signifies that their importation is subject to particular conditions or restrictions, often temporary in nature, as proclaimed under trade agreements or other statutory authorities like Section 22 of the Agricultural Adjustment Act.

This classification is distinct from the broad range of sibling categories that typically encompass live animals, agricultural products, or other general merchandise under Chapter 99. Those categories address different types of goods and are governed by distinct tariff and trade regulations. Unlike general chemical classifications found in earlier chapters, this heading is reserved for these particular dye mixtures due to their specific trade-related treatment rather than their general chemical properties or end-use applications.

As a leaf node, this category does not have further subdivisions. Therefore, the focus is on the precise identification of the covered mixtures. Classification under 9902.08.50 requires that the imported product be a mixture of the exact substances described, Reactive Blue 19 (CAS No. 2580-78-1) and Reactive Blue 187 (CAS No. 79771-28-1), and that the importing entity be aware of and comply with the associated temporary provisions or restrictions that necessitate this specific classification, which can also be found under the referenced subheading 3204.16.30.