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. Classified under HTS 2511.20.00.00 as unprocessed natural witherite, whether or not calcined but excluding barium oxide. It serves as the primary source for industrial barium chemicals.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically precipitated rather than naturally occurring
Synthetic barium carbonate produced via chemical reaction falls under inorganic chemicals in Chapter 28, not natural minerals.
If heavily processed into powder for specific industrial fillers
Extensive processing beyond calcining may classify it as 'other mineral substances' under heading 2530 rather than pure witherite.
If sold as prepared chemical additive with other substances
Mixtures containing witherite as a component for chemical use shift to Chapter 38 for prepared chemical products.
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Import Tips & Compliance
• Verify purity through assay certificates to confirm natural barium carbonate content and avoid reclassification as synthetic under Chapter 28
• Provide geological origin documentation as proof of natural extraction to distinguish from precipitated barium carbonate
• Ensure proper labeling as 'natural witherite' to prevent customs disputes over calcination status
Related Products under HTS 2511.20.00.00
Calcined Witherite Lumps
Witherite ore that has undergone thermal calcination to remove impurities while retaining its natural barium carbonate composition in lump form. Falls under HTS 2511.20.00.00 as calcined natural barium carbonate, explicitly covered in the heading excluding only barium oxide. Primarily used in glass manufacturing and chemical synthesis.
Witherite Mineral Powder
Ground natural witherite reduced to powder form after extraction and optional calcining, maintaining its barium carbonate mineral identity. HTS 2511.20.00.00 covers this as natural barium carbonate in any physical state short of chemical alteration. Essential for drilling muds and pyrotechnics production.
High-Grade Witherite Concentrate
Beneficiated witherite ore with elevated barium carbonate content through natural separation processes like flotation, sold as concentrate. Remains under HTS 2511.20.00.00 as it's still natural mineral, not chemically synthesized. Used in specialty glass and ceramic frits.
Witherite Drilling Grade Additive
Natural witherite processed to specific particle size for use as a weighting agent in oil well drilling fluids. HTS 2511.20.00.00 applies as it's unchanged natural barium carbonate, meeting industry specs for density control. Key component in high-pressure drilling operations.
Calcined Witherite for Glassmaking
Specially calcined natural witherite meeting glass industry standards for barium content, used to introduce BaO into glass formulations. Covered by HTS 2511.20.00.00 as calcined witherite before full decomposition to oxide. Critical for optical and TV glass production.
Natural Witherite Pyrotechnic Grade
Fine-ground natural barium carbonate selected for purity in fireworks and signal flare production. HTS 2511.20.00.00 classification holds as it's minimally processed mineral for chemical reaction. Provides green coloration in pyrotechnic displays.