2832.10.00.00 - Sodium sulfites

This HTS category, 2832.10.00.00, specifically covers sodium sulfites. These are inorganic chemical compounds characterized by the sulfite ion (SO₃²⁻) combined with sodium cations (Na⁺). Sodium sulfites are typically encountered as crystalline solids and find application in various industrial processes, including as reducing agents, preservatives in food and beverages, and in photographic developers. The key classification criterion is the chemical composition, specifically the presence of sodium as the counter-ion to the sulfite radical.

Within the broader heading of "Sulfites; thiosulfates," this category distinguishes itself from 2832.20.00.00, which encompasses all other sulfites (i.e., sulfites not based on sodium). Similarly, it is separate from the "Thiosulfates" subgroup (2832.30), which covers compounds containing the thiosulfate ion (S₂O₃²⁻). Therefore, correct classification hinges on identifying the specific cation and anion present in the chemical compound.

As this is a leaf node, there are no further subcategories within 2832.10.00.00. The classification is specific to sodium sulfites in all their forms, provided they meet the general chemical requirements of the heading. When encountering products for classification under this code, practitioners should confirm the chemical identity through product documentation, laboratory analysis if necessary, and ensure that the product is not a mixture containing other classified substances that might warrant a different classification.