3824.99.31.00 - Of bismuth

This HTS category, 3824.99.31.00, specifically enumerates chemical products and preparations that are characterized by the presence of bismuth. These are typically mixtures or formulations where bismuth compounds are the principal or defining component. Such products may find application in various industrial processes, including metallurgy, pharmaceuticals, or the manufacturing of specialized ceramics and glass, depending on the specific chemical form and intended use of the bismuth.

Distinguishing this category from its siblings, such as those containing hydrosulfite compounds, mercury, or other metallic elements like molybdenum, tungsten, or vanadium, relies on the definitive identification of bismuth as the key constituent. While all fall under the broader umbrella of "mixtures of two or more inorganic compounds" or "other" chemical preparations not elsewhere specified, the defining characteristic for classification under 3824.99.31.00 is the presence and significance of bismuth.

As this is a leaf node within the HTS structure, there are no further subdivisions under 3824.99.31.00. Classification at this level is determined by the explicit identification of bismuth as the primary component of the chemical preparation or mixture, in contrast to other inorganic compounds or metallic elements that define the sibling categories. Practical classification will therefore focus on the analysis of the product's composition to confirm the presence and proportion of bismuth.