2931.90.05.00 - Diphenyldichlorosilane; and phenyltrichlorosilane

This HTS classification, 2931.90.05.00, specifically covers organo-inorganic compounds where aromatic substituents are attached to silicon atoms via a carbon-silicon bond. The key chemicals falling under this heading are diphenyldichlorosilane and phenyltrichlorosilane. These compounds are characterized by the presence of phenyl groups (aromatic rings) bonded to silicon atoms, along with chlorine atoms also attached to the silicon. They are crucial intermediates in the production of various silicones and other specialty organosilicon materials.

This classification is distinct from its sibling categories by its exclusive focus on specific organosilicon compounds with aromatic and chlorine functionalities. For instance, 2931.90.10.00 covers a complex phenyl ester of a bisphosphonous acid, which is an organophosphorus compound, not an organosilicon compound. Similarly, 2931.90.15.00 relates to sodium tetraphenylboron, an organoboron compound, highlighting the specificity of this silicon-focused heading.

As this is a leaf node, there are no further subdivisions. Therefore, the classification criteria rely heavily on the precise chemical identity of the goods. Importers and exporters must ensure their product strictly conforms to the chemical structures of diphenyldichlorosilane or phenyltrichlorosilane to correctly utilize this HTS code. This meticulous identification is essential to avoid misclassification and ensure compliance with customs regulations.