2931.10.00.00 - Tetramethyl lead and tetraethyl lead

This HTS category, 2931.10.00.00, specifically covers tetramethyl lead and tetraethyl lead. These are organometallic compounds where lead is bonded to organic groups. Historically, these substances were primarily used as gasoline additives to boost octane ratings and prevent engine knocking. Their classification within Section VI, Chapter 29, signifies their nature as distinct organic chemical compounds.

It is important to distinguish this category from its siblings. While all fall under "Other organo-inorganic compounds," 2931.10.00.00 is uniquely defined by the presence of lead as the metal component and methyl or ethyl groups as the organic ligands. This differentiates it from other organometallic compounds, such as the tributyltin compounds (2931.20.00.00), which involve tin and butyl groups, or the various organo-phosphorous derivatives, which are characterized by phosphorus as the central element.

As a leaf node, 2931.10.00.00 does not have further subcategories for more granular classification. Therefore, the primary classification criterion remains the specific identification of tetramethyl lead and tetraethyl lead. Any product meeting these chemical specifications will fall under this heading. It is crucial to note that due to environmental and health concerns, the use of these specific lead compounds has been significantly restricted or banned in many jurisdictions, but their HTS classification remains for historical and potential specialized industrial applications.