2833.27.00.00 - Of barium

This HTS category, 2833.27.00.00, specifically classifies sulfates of barium. Barium sulfate, in its various forms, is the primary subject here. These compounds are characterized by the presence of the barium cation (Ba²⁺) bonded to the sulfate anion (SO₄²⁻). Common applications include use as a white pigment, a filler in plastics and rubber, and in medical imaging as a radiocontrast agent.

Unlike sibling categories that cover sulfates of magnesium (2833.21), aluminum (2833.22), nickel (2833.24), or copper (2833.25), this classification is exclusively for barium-based sulfates. The key distinguishing factor is the metallic element present in the compound. Other sulfates are grouped under the broader "Other sulfates" subheading (2833.29), which would encompass sulfates of elements not specifically enumerated at this level.

As this is a leaf node in the HTS structure, there are no further subcategories. Therefore, the focus for classification within 2833.27.00.00 is on confirming the chemical composition of the imported product to ensure it is indeed a barium sulfate and not a sulfate of another metal. This ensures accurate tariff application based on the specific chemical identity of the goods.