0506.90.00 - Other

This HTS category, 0506.90.00, encompasses "Other" products within the broader group of bones and horn-cores. Specifically, it covers unworked, defatted, or simply prepared (but not cut to shape) bones and horn-cores, as well as their powders and waste. This preparation includes treatment with acid or degelatinization, provided the material is not further processed into specific shapes. The intent of this classification is to capture bone and horn-core materials that do not fall under more specific subheadings within Chapter 5.

It is important to distinguish this category from its sibling, 0506.10.00.00, which specifically covers "Ossein and bones treated with acid." While both may involve acid treatment, 0506.10.00.00 is reserved for ossein (the organic matrix of bone) and bones primarily characterized by acid treatment, often for extraction purposes. Category 0506.90.00, conversely, is a residual category for other forms of bones and horn-cores that are prepared in a general manner but not specifically ossein or solely acid-treated bones for extraction.

To further refine classification within this residual category, subcategories exist. 0506.90.00.20 specifically addresses "Bones, crude, steamed or ground." This implies that if the bone material is simply steamed or ground, it will be classified here. The remaining "Other" subcategory, 0506.90.00.40, serves as a final catch-all for any bone or horn-core products meeting the general description of 0506.90.00 but not fitting the more specific criteria of the "crude, steamed or ground" subdivision.