9902.05.78 - Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (CAS No. 52829-07-9) (provided for in subheading 2933.39.20)

This HTS code, 9902.05.78, specifically covers Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, identified by CAS Number 52829-07-9. This substance is typically utilized as an ultraviolet light absorber and stabilizer in plastics and coatings, thereby preventing degradation from sun exposure. Its inclusion within Chapter 99 signifies a temporary legislative or proclaimed modification related to import restrictions or trade agreements, directing the importer to a specific subheading (2933.39.20) for its primary classification under the chemical chapters.

As a leaf node within Chapter 99, this category has no direct subcategories. Its existence as a distinct HTS code within this chapter highlights a specific, potentially time-limited, duty or import regulation applied to this particular chemical compound. Unlike the broader categories of live animals found at the root of the HTS structure (e.g., 0101, 0102), this classification focuses on a specialized chemical product subject to special import provisions.

The classification of Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate under 9902.05.78 serves to flag it for particular tariff treatment or quantitative restrictions, separate from its base classification in Chapter 29. Importers must be aware of both the temporary provision in Chapter 99 and the underlying classification in Chapter 29 to ensure accurate customs declarations and compliance with all applicable regulations.