2710.99.32.00 - Containing not over 10 percent by weight of salts of fatty acids of animal (including marine animal) or vegetable origin

This HTS code, 2710.99.32.00, specifically covers waste oils derived from greases that contain a low proportion, not exceeding 10 percent by weight, of salts of fatty acids. These salts can originate from either animal (including marine) or vegetable sources. The classification focuses on the chemical composition of the waste grease, particularly the presence and quantity of these fatty acid salts, which are a key distinguishing factor.

This category is differentiated from its sibling, 2710.99.39.00 ("Other"), by the precise threshold of fatty acid salt content. While both fall under "Wastes of lubricating oils and greases (whether or not containing additives): Of greases:", code 2710.99.32.00 applies only when this specific additive percentage is met. If the waste grease contains a higher percentage of fatty acid salts or other types of additives not explicitly defined elsewhere, it would be classified under the "Other" category.

As this is a leaf node, there are no further subcategories. Classification within this code hinges on meeting the criteria of being a waste grease and having no more than 10 percent by weight of animal or vegetable fatty acid salts. Therefore, the primary determinant for classification here is the quantitative analysis of these specific components within the waste grease material.