0506.10.00.00 - Ossein and bones treated with acid

This HTS category, 0506.10.00.00, specifically covers ossein and bones that have undergone treatment with acid. Ossein, a collagenous substance derived from bones, and bones themselves, when subjected to acid processing to remove inorganic salts and impurities, fall under this heading. This treatment prepares the materials for further industrial uses, such as in the production of gelatin or pharmaceuticals.

This classification distinguishes itself from its sibling category, 0506.90.00, which encompasses "other" ossein, bones, and horn-cores. While 0506.90.00 would include unworked, defatted, or simply prepared (but not cut to shape) bone products, or degelatinized powder and waste, 0506.10.00.00 is precisely for those materials that have been chemically altered through acid treatment. The defining characteristic here is the acid processing step.

As this is a leaf node in the HTS structure, there are no further subcategories under 0506.10.00.00. Therefore, the classification is final for goods meeting the description of ossein and bones treated with acid. Importers and exporters should ensure that the acid treatment is the primary processing method applied to the ossein or bones for them to be correctly classified within this specific heading.