2931.90.90.25 - Tetrabutyltin

This HTS category, 2931.90.90.25, specifically classifies Tetrabutyltin. Tetrabutyltin is an organometallic compound characterized by four butyl groups attached to a tin atom. Its primary applications often lie within the chemical industry, serving as a stabilizer or catalyst in various polymer production processes.

Distinguishing this classification from its siblings, 2931.90.90.21 covers Dibutyltin oxide, a different organotin compound with a distinct molecular structure and often different industrial uses, such as in PVC stabilization. Category 2931.90.90.29 encompasses "Other" organotin compounds not specifically listed, making 2931.90.90.25 the precise designation for Tetrabutyltin.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification under 2931.90.90.25 is definitive for Tetrabutyltin, requiring careful verification of the chemical composition and intended use to ensure accurate customs declarations.