9902.05.31 - Bis[tris(2-methyl-2-phenylpropyl)tin]oxide (Fenbutatin oxide) (CAS No. 13356-08-6) (provided for in subheading 2931.90.26)

This HTS code, 9902.05.31, specifically covers Bis[tris(2-methyl-2-phenylpropyl)tin]oxide, also known by its common name Fenbutatin oxide (CAS No. 13356-08-6). This chemical compound is a miticide and acaricide, primarily used in agricultural and horticultural applications to control various mite species on crops. Its classification within Chapter 99 signifies that it falls under temporary legislation, which may include specific duties, quotas, or other import restrictions proclaimed pursuant to trade agreements or Section 22 of the Agricultural Adjustment Act.

While other categories within the HTS system classify a vast array of goods, from live animals to manufactured products, this particular code is dedicated to a highly specific chemical substance. Unlike the broad categories found in earlier chapters which deal with live animals or basic commodities, 9902.05.31 isolates a particular organotin compound. Its placement within Section XXII and Chapter 99 highlights its role as a subject of special trade provisions, distinct from general tariff classifications.

As this is a leaf node within the HTS structure, there are no further subcategories. The classification is specific to Fenbutatin oxide itself, with no subdivisions based on purity, form, or intended use beyond its identified pesticidal function. Therefore, the primary classification criteria rely on the precise chemical identity and its recognized CAS number, ensuring accurate identification for the application of relevant temporary import regulations.