Witherite, the naturally occurring mineral form of barium carbonate, is a relatively rare industrial mineral classified under a single US tariff line, 2511200000. It serves as a source of barium in specialty glass, ceramic glazes, and certain chemical manufacturing processes, though synthetic barium carbonate produced from barite has largely displaced natural witherite in most commercial applications. Trade professionals importing under this heading should be prepared to document the natural mineral origin to distinguish the product from synthetically produced barium carbonate, which falls under a different chapter.
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Natural barium carbonate (witherite) is classified under HTS 2511200000 as a mineral product of Chapter 25. Synthetically produced barium carbonate — manufactured by chemical reaction rather than mined — falls under Chapter 28 as an inorganic chemical compound. A mineralogical certificate or statement of origin confirming the natural mineral source is advisable to support the Chapter 25 classification.
Witherite is used in specialty glass manufacturing (including CRT and optical glass), ceramic glazes, and as a flux in certain metallurgical processes. Its use has declined as synthetic barium carbonate offers more consistent purity, so imports tend to be small-volume and application-specific.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2511200000 | Natural Barium Carbonate (Witherite) | — | -- | -- |
Subheading 2 of 2 in heading 2511
Trade Directory
List your company under HS 251120 — Natural Barium Carbonate (Witherite), so the companies trading it can find you. Be the first supplier listed.
ImportsExports
Imports
—YoY · free account
Exports
—YoY · free account
Low of 2 reported months · imports
Low · free accountFewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 2 of 12 months reported, exports 6 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
customs district
destination
entry
rate provision · imports
None recorded for this period.