9902.06.40 - 1-Acetyl-1,2,3,4-tetrahydro-3-[(3-pyridylmethyl)amino]- 6-[1,2,2,2-tetrafluoro-1-(trifluoromethyl) ethyl] quinazolin-2-one (Pyrifluquinazon) (CAS No. 337458-27-2) (provided for in subheading 2933.59.70)

This HTS classification, 9902.06.40, designates the compound 1-Acetyl-1,2,3,4-tetrahydro-3-[(3-pyridylmethyl)amino]-6-[1,2,2,2-tetrafluoro-1-(trifluoromethyl)ethyl]quinazolin-2-one, also known by its common name Pyrifluquinazon (CAS No. 337458-27-2). This specific entry falls under Chapter 99, which covers temporary legislation and special provisions. Its inclusion here indicates a particular trade policy or restriction applied to this chemical substance, separate from its standard classification under Chapter 29 (which is provided as 2933.59.70).

Unlike the broad categories of live animals or agricultural products that populate much of the initial HTS structure (e.g., Chapters 01-24), this node represents a highly specific chemical compound. The distinction lies in its chemical nature and its treatment under temporary trade measures. The siblings of this node, such as live horses or swine, cover entirely different classes of goods and are subject to different tariff treatments and regulatory frameworks. This particular entry is for a singular chemical substance with a defined CAS number and chemical structure, highlighting a focused regulatory approach.

As a leaf node, HTS 9902.06.40 does not have further subcategories. This signifies that all imports of Pyrifluquinazon under these specific temporary provisions will be classified directly under this code. The "provided for in subheading 2933.59.70" notation is crucial, as it clarifies that while the substance itself is a chemical product primarily classifiable under Chapter 29, its current entry into this 9902 category is due to a specific, likely time-bound, trade action. Importers must adhere to the stipulations associated with this Chapter 99 provision when declaring this substance.