2930.30 - Thiuram mono-, di- or tetrasulfides:

Category 2930.30 encompasses thiuram mono-, di-, or tetrasulfides. These are organosulfur compounds characterized by the presence of thiuram groups, which contain sulfur atoms bonded to nitrogen within a four-membered ring or related structures. These chemicals often serve as intermediates, accelerators in rubber vulcanization, or components in agricultural chemicals.

Within the broader organosulfur compound chapter (Chapter 29), this category is distinct from other thiuram-related or sulfur-containing compounds. For instance, it differentiates from thiocarbamates and dithiocarbamates (2930.20), which have a different structural arrangement of sulfur and nitrogen atoms. Similarly, it is separate from simpler organosulfur compounds like methionine (2930.40) or thiodiglycol (2930.70), which lack the characteristic thiuram disulfide linkage.

This category is further subdivided to provide more granular classification. Subcategory 2930.30.30.00 specifically covers Tetramethylthiuram monosulfide, a common compound used in rubber processing. The residual "Other" subcategory (2930.30.60.00) is available for all other mono-, di-, or tetrasulfides of thiuram that do not fall under the more specific heading, ensuring comprehensive coverage of this chemical group.