9902.05.53 - Erythorbic acid ((5R)-5-[(1R)-1,2-dihydroxyethyl]-3,4-dihydroxy-2(5H)-furanone) (CAS No. 89-65-6) (provided for in subheading 2932.20.50)

This HTS category, 9902.05.53, specifically addresses Erythorbic acid, identified by its chemical name ((5R)-5-[(1R)-1,2-dihydroxyethyl]-3,4-dihydroxy-2(5H)-furanone) and CAS Number 89-65-6. It is important to note that this entry is a temporary or special provision and is *provided for in subheading 2932.20.50* under the permanent HTS structure. This means that while classified under Chapter 99 for specific trade or legislative purposes, the inherent nature of the product aligns with chemical compounds of the 29th Chapter.

Distinguishing this category from its siblings within the broader HTS structure is crucial. The sibling categories presented (e.g., Live horses, bovine animals, swine, sheep, goats, and poultry) are entirely distinct, covering live animals. Category 9902.05.53, conversely, pertains to a specific organic chemical compound, Erythorbic acid, which has various industrial applications, notably as an antioxidant in food and beverage production. The fundamental difference lies in the subject matter: live animals versus a chemical substance.

As this is a leaf node, there are no subcategories within 9902.05.53 to introduce. Classification at this level is definitive for Erythorbic acid under the specific conditions it represents within Chapter 99. Practical classification hinges on the accurate identification of the chemical compound as Erythorbic acid, recognizing its presence under this special provision and its underlying classification within subheading 2932.20.50. This ensures correct tariff treatment under the temporary or special legislative measures that necessitate its inclusion in Chapter 99.