9902.05.43 - (2-Chloroethyl)phosphonic acid (Ethephon) (CAS No.16672-87-0) (provided for in subheading 2931.90.90)

This HTS classification, 9902.05.43, specifically addresses (2-Chloroethyl)phosphonic acid, commonly known as Ethephon. Ethephon is a plant growth regulator used in agriculture to promote ripening, flowering, and fruit abscission. Its inclusion within Chapter 99 signifies a temporary modification or restriction related to its import, often linked to specific trade agreements or agricultural policies.

While other categories within Chapter 99 might address various temporary trade measures, this particular code is narrowly defined for Ethephon. Its distinction from other HTS codes lies in its precise chemical identity and its intended application as a plant growth regulator. Unlike broader categories for chemicals or agricultural products, this code targets a specific substance with a defined CAS number for unambiguous identification.

As this is a leaf node within the HTS database, there are no further subdivisions under 9902.05.43. Therefore, the focus for classification purposes remains on the correct identification of (2-Chloroethyl)phosphonic acid (Ethephon). Importers must ensure that the product being declared precisely matches the chemical name, CAS number, and is intended for the purposes indicated by the parenthetical reference to subheading 2931.90.90, while adhering to any temporary restrictions or reporting requirements associated with this Chapter 99 code.