9902.03.89 - 2-{[2,4,8,10-Tetrakis(2-methyl-2-propanyl)diben- zo[d,f][1,3,2]dioxaphosphepin-6-yl]oxy}-N,N-bis(2-{[2,4,8,10-tetra- kis(2-methyl-2-propanyl)dibenzo[d,f][1,3,2]dioxaphos- phepin-6-yl]oxy}ethyl)ethanamine (CAS No. 80410-33-9) (provided for in subheading 2922.19.60)

This HTS code, 9902.03.89, falls under Section XXII of the Harmonized Tariff Schedule, which pertains to Special Classification Provisions and Temporary Legislation. Specifically, this subheading is designated for temporary modifications or additional import restrictions proclaimed under trade agreements legislation or Section 22 of the Agricultural Adjustment Act. The described chemical compound, 2-{[2,4,8,10-Tetrakis(2-methyl-2-propanyl)dibenzo[d,f][1,3,2]dioxaphosphepin-6-yl]oxy}-N,N-bis(2-{[2,4,8,10-tetrakis(2-methyl-2-propanyl)dibenzo[d,f][1,3,2]dioxaphosphepin-6-yl]oxy}ethyl)ethanamine (CAS No. 80410-33-9), is a complex organophosphorus compound.

The primary function of subheadings within Chapter 99 is to implement specific trade policies that may temporarily alter duties or impose restrictions on certain goods, often in response to international trade agreements or domestic agricultural support measures. Unlike the core Chapters of the HTS which classify goods based on their inherent nature and use, Chapter 99 serves as a mechanism for applying special trade provisions. Therefore, this classification is not determined by the physical properties or primary use of the chemical itself in isolation, but rather by its status under special trade regulations.

This specific subheading is a leaf node, meaning it represents the most granular level of classification for this particular item under these temporary provisions. Its designation as "provided for in subheading 2922.19.60" indicates that the chemical would typically be classified under a permanent chapter based on its chemical structure and properties. However, its presence in Chapter 99 signifies that it is subject to specific, temporary trade measures that supersede its standard classification for the duration of those provisions.