Witherite Drilling Grade Additive
Natural witherite processed to a specific particle size for use as a weighting agent in oil well drilling fluids. This product is unchanged natural barium carbonate, meeting industry specifications, and falls under tariff item 2511.20.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is a prepared drilling fluid additive
Prepared chemical products fall under Chapter 38.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is not mixed with other drilling fluid additives, as that could reclassify it under Chapter 38
• Provide particle size distribution data to show it is only mechanically processed
• Confirm no chemical treatment has altered the mineral structure
Related Products under Tariff item 2511.20.00
Calcined Witherite for Glassmaking
Calcined natural witherite processed to meet glass industry standards for barium content, used to introduce BaO into glass formulations. This product retains its natural barium carbonate composition, as calcination does not fully decompose it to barium oxide, and it is not excluded by Chapter 25 notes.
Calcined Witherite Lumps
Witherite ore in lump form that has undergone thermal calcination to remove impurities while retaining its natural barium carbonate composition. This product falls under tariff item 2511.20.00 as calcined natural barium carbonate, provided the calcination does not convert it to barium oxide.
High-Grade Witherite Concentrate
Beneficiated witherite ore with elevated barium carbonate content, concentrated through flotation or other mechanical processes. This remains natural barium carbonate under tariff item 2511.20.00, as the concentration processes are permitted by Chapter 25 note 1.
Natural Witherite Pyrotechnic Grade
Fine-ground natural barium carbonate selected for purity for use in fireworks and signal flares, providing green coloration. This product is minimally processed and retains its natural mineral identity, qualifying under tariff item 2511.20.00.
Pharmaceutical Grade Witherite
Ultra-pure natural witherite meeting pharmacopeia standards for barium content, used as a raw material for radiopaque agents. This product is classified under tariff item 2511.20.00 as it is a natural mineral source, not yet formulated into a medicament.
Raw Witherite Ore
Natural barium carbonate ore extracted from mineral deposits, typically in lump or crushed form, used as a raw material for barium compound production. This unprocessed witherite falls under tariff item 2511.20.00 as natural barium carbonate in its crude state.