9902.03.43 - Aluminum tris(ethyl phosphonate) (Fosetyl-Al) (CAS No. 39148-24-8) (provided for in subheading 2920.90.51)

This HTS code, 9902.03.43, specifically covers Aluminum tris(ethyl phosphonate), commonly known as Fosetyl-Al. This chemical compound, identified by CAS No. 39148-24-8, is a systemic fungicide primarily used in agriculture. Its inclusion within Chapter 99 signifies that it is subject to special classification provisions, temporary legislation, or temporary modifications related to trade agreements or additional import restrictions, as proclaimed under Section 22 of the Agricultural Adjustment Act.

Unlike the broader categories found in Chapters 1-98 of the Harmonized Tariff Schedule, which classify goods based on their inherent nature and use (e.g., live animals, chemicals, machinery), Chapter 99 codes are dynamic and can change based on specific U.S. trade policy actions. Therefore, this particular classification is not distinguished from siblings in the traditional sense of product type, but rather by its designation as a product subject to special import rules. Its specific provision under subheading 2920.90.51 indicates its underlying classification as a chemical compound prior to the application of these temporary measures.

As this is a leaf node within the HTS database, there are no further subcategories or subdivisions under HTS code 9902.03.43. The classification is definitive for Fosetyl-Al when imported under the conditions stipulated by the temporary legislation or proclamations associated with this Chapter 99 code. Importers must consult the specific proclamations and trade notices referenced by this code to understand the precise duties, restrictions, or reporting requirements applicable.