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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.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
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.
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Subheading 2 of 2 in heading 2511
Subheading 251120 · $0 of $9.0M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share |
|---|---|---|---|---|
| 2511200000 | Natural Barium Carbonate (witherite) | $0 | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2511200000 | Natural Barium Carbonate (witherite) | $18K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$0YoY · Pro
Exports
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12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
customs district
destination
entry
rate provision · imports
None recorded for this period.