Chapter 2511 — Customs Tariff Headings
Subheadings
Products classified under Tariff item 25.11
Barytes Lump for Grinding
Lump form natural barium sulphate ore suitable for further grinding into powder, sourced from barytes deposits. The product is in the crude state, which is covered by Chapter 25 Note 1, and has not been subjected to any processing beyond mining and sorting.
2511.10.00Blizzard Ground Barytes Paint Grade
Premium white ground natural barium sulphate (barytes) for architectural paints, offering superior whiteness and low oil absorption. The product is processed only by grinding, which is permitted under Chapter 25 Note 1, and is not mixed or otherwise altered beyond that.
2511.10.00Calcined Ground Witherite for Ceramics
Lightly calcined and ground natural witherite (barium carbonate) for ceramic glazes and frits. The calcination is not to barium oxide, so it remains under heading 25.11, and the product is not subjected to processing beyond that allowed by Chapter 25 Note 1.
2511.10.00Ground Barytes for Paper Coating
Precisely ground barytes used as a pigment extender and coating agent in high-quality paper production. The product is natural barium sulphate processed only by grinding, which is permitted under Chapter 25 Note 1, and is not mixed or chemically treated.
2511.10.00Ground Barytes for Pyrotechnics
Finely ground natural barytes used as an oxidizer and density modifier in fireworks and signal flares. The product is natural barium sulphate processed only by grinding, which is permitted under Chapter 25 Note 1, and is not mixed with other chemicals.
2511.10.00Ground Barytes for Radiation Shielding
High-purity ground barytes powder incorporated into concrete and plastics for X-ray and gamma shielding due to barium's high atomic number. The product is natural barium sulphate processed only by grinding, which is permitted under Chapter 25 Note 1, and is not mixed or chemically treated.
2511.10.00Ground Barytes for Rubber Compounds
High-density ground barytes powder added to rubber formulations for tire weighting and reinforcement. The product is natural barium sulphate processed only by grinding, which is permitted under Chapter 25 Note 1, and is not mixed with rubber or other compounds.
2511.10.00Ground Barytes Powder for Drilling Mud
Finely ground natural barium sulphate (barytes) processed to a powder form suitable for use as a weighting agent in oil and gas drilling fluids. The product is processed only by grinding and sieving, which is allowed under Chapter 25 Note 1, and is not mixed with any additives.
2511.10.00Ground Witherite Powder
Ground natural barium carbonate (witherite) ore, calcined or not, finely powdered for use in glass manufacturing and pyrotechnics. The product is processed only by grinding and possibly calcination, which is permitted under Chapter 25 Note 1, and is not converted to barium oxide.
2511.10.00Micronized Ground Barytes Filler
Ultra-fine ground natural barytes with particle sizes under 5 microns, used as a functional filler in paints, coatings, and plastics to enhance density and abrasion resistance. The product is processed only by grinding and classification, which is permitted under Chapter 25 Note 1, and is not mixed or chemically treated.
2511.10.00Superfine Ground Barytes for Pharmaceuticals
Pharmaceutical-grade ground natural barytes, purified and micronized for use as an inert excipient or radio-opaque agent in contrast media. The product is natural barium sulphate processed only by grinding and purification (washing), which is permitted under Chapter 25 Note 1, and is not mixed with any pharmaceutical ingredients.
2511.10.00Washed Barytes Ore
Natural barium sulphate ore that has been washed to remove impurities but not finely ground, used primarily as a filler in paints and plastics. The product is processed only by washing, which is permitted under Chapter 25 Note 1, and is not subjected to any further processing.
2511.10.00Witherite for Strontium Production
Natural barium carbonate (witherite) selected for reduction to barium metal or strontium compounds in chemical synthesis. The product is in the crude state or processed only by mechanical means, which is permitted under Chapter 25 Note 1, and is not calcined to barium oxide.
2511.10.00Witherite Ore Concentrate
Concentrated natural barium carbonate (witherite) ore from flotation processing, used in pyrotechnics and specialty chemicals. The product is processed by flotation, which is permitted under Chapter 25 Note 1, and is not calcined to barium oxide or mixed with other substances.
2511.20.00Calcined 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.
2511.20.00Calcined 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.
2511.20.00High-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.
2511.20.00Natural 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.
2511.20.00Pharmaceutical 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.
2511.20.00Raw 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.
2511.20.00Witherite Ceramic Flux
Calcined witherite prepared as a fluxing agent for ceramic bodies and glazes, lowering melting temperatures. This product retains its natural barium carbonate composition and is classified under tariff item 2511.20.00, as calcination is permitted and it is not excluded by Chapter 25 notes.
2511.20.00Witherite 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.
2511.20.00Witherite Mineral Powder
Ground natural witherite reduced to powder form after extraction and optional calcining, maintaining its barium carbonate mineral identity. This product is covered by tariff item 2511.20.00 as natural barium carbonate in any physical state, provided it is not processed beyond Chapter 25 note 1 limits.