3920.79 - Of other cellulose derivatives:

This category, HTS Code 3920.79, encompasses plates, sheets, film, foil, and strip made from cellulose derivatives, excluding those specifically classified as regenerated cellulose (3920.71) or cellulose acetate (3920.73). These materials are distinct from the sibling categories due to their chemical composition being derived from cellulose but not falling into the more specific regenerated or acetate classifications. Examples within this broad group could include materials derived from cellulose nitrate, cellulose ethers, or other chemical modifications of cellulose that result in plastic-like properties.

The primary distinguishing factor from its siblings lies in the specific chemical modification of the cellulose base. While 3920.71 covers materials derived from regenerated cellulose (often produced by dissolving cellulose and re-precipitating it), and 3920.73 is dedicated to cellulose acetate, this 3920.79 classification is for any *other* cellulose derivative. Therefore, the key to classifying goods under this code is to identify the cellulose derivative used, confirming it is not regenerated cellulose or cellulose acetate.

Further subdivisions exist to refine the classification within this "other cellulose derivatives" group. Subcategory 3920.79.05.00 specifically addresses "Of vulcanized fiber," which is a cellulosic material treated with sulfuric acid and then compressed. The remaining subcategories, denoted by "Other," are for all other plates, sheets, film, foil, and strip of cellulose derivatives not falling under vulcanized fiber or the previously mentioned sibling categories. This structure allows for a precise classification based on the specific type of cellulose derivative.