2849.90 - Other:

HTS code 2849.90, "Other," within the broader category of Carbides, serves as a residual classification for carbides that are not specifically enumerated under the preceding subheadings. This category encompasses chemical compounds formed by the combination of carbon with an element less electronegative than carbon, where these carbides are not of calcium or silicon. The classification of goods under 2849.90 hinges on their composition, excluding those identified as calcium carbide (2849.10) or silicon carbide (2849.20).

The distinction between 2849.90 and its sibling categories is solely based on the primary metallic or non-metallic element bonded with carbon. While 2849.10 specifically addresses calcium carbide, and 2849.20 is dedicated to silicon carbide, 2849.90 captures a diverse range of other metallic and non-metallic carbides. The precise chemical identity and the absence of classification under more specific headings are critical for accurate placement within this residual category.

This "Other" category is further subdivided to provide more granular classification for specific types of carbides. Subheadings such as 2849.90.10.00 for boron carbides, 2849.90.20.00 for chromium carbides, and 2849.90.30.00 for tungsten carbides allow for the precise identification of these materials. The existence of these subcategories underscores the importance of knowing the specific elemental composition of the carbide in question to ensure correct tariff classification. The residual 2849.90.50.00 subheading is then reserved for any remaining carbides not otherwise specified.