3502.90.00.00 - Other

This category, HTS 3502.90.00.00, serves as a residual classification for albuminoidal substances that do not fall under the more specific categories within heading 3502. It encompasses various albumin derivatives and other similar protein-based substances not explicitly enumerated elsewhere in the heading. The scope is broad and includes materials derived from sources other than eggs or milk, or those that are significantly modified from their original albumin form.

It is crucial to distinguish this category from its siblings. HTS 3502.10 covers egg albumin, while HTS 3502.20 specifically addresses milk albumin, including concentrates of whey proteins. Therefore, 3502.90.00.00 is reserved for albumins and their derivatives that are neither derived from eggs nor milk, or that have undergone processing and modification that places them outside the defined scope of the egg and milk albumin categories.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification into 3502.90.00.00 will depend on the specific nature of the albuminoidal substance, its source, and the degree of modification or derivatization, ensuring it does not meet the criteria for any other more specific subheading under heading 3502. Examples might include plant-based albumins or highly processed animal albumins with unique properties.