2620.21.00.20 - Lead content

This HTS category, 2620.21.00.20, specifically classifies residues containing a primary concentration of lead, originating from the manufacturing processes of leaded gasoline and anti-knock compounds. These sludges represent waste materials generated from the production or refinement of fuels where lead compounds were used as additives to enhance octane ratings or as anti-knock agents. The presence of significant lead content is the defining characteristic for inclusion under this heading.

Distinguishing this category from its siblings is crucial for accurate classification. While all fall under the broader heading of "Slag, ash and residues (other than from the manufacture of iron or steel), containing arsenic, metals or their compounds: Containing mainly lead:", this specific subheading narrows the focus to those sludges derived from leaded gasoline and anti-knock compound production. For instance, sibling categories like 2620.21.00.10 cover residues where copper is the primary metal, 2620.21.00.30 focuses on zinc, and 2620.21.00.40 and 2620.21.00.50 are for residues predominantly containing silver and gold, respectively. The determination of the primary metal is based on the percentage composition of the residue.

As a leaf node in the HTS, 2620.21.00.20 does not have further subdivisions. Therefore, classification within this code relies on definitively identifying the material as sludges from leaded gasoline or anti-knock compound manufacturing and confirming that lead is the principal metallic component by weight, distinguishing it from other lead-bearing residues covered elsewhere. Practical classification would involve analyzing the composition of the residue and understanding its source of origin.