Crude or unrefined sulfur
Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur > Crude or unrefined sulfur
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2503.00.00.10
Native Crude Sulfur Ore
Raw sulfur extracted directly from volcanic deposits or caprock formations, containing impurities like soil and rock. Classified under HTS 2503.00.0010 as crude or unrefined sulfur, excluding sublimed, precipitated, or colloidal forms per Chapter 25 notes.
Frasch Process Crude Sulfur
Yellowish sulfur blocks mined via the Frasch hot-water process from underground Gulf Coast domes, unrefined with minor impurities. Falls under HTS 2503.00.0010 for crude sulfur of all kinds, not further processed.
Volcanic Crater Crude Sulfur
Impure sulfur crystals harvested from active volcanic craters like those in Indonesia or Japan, in raw lump form. HTS 2503.00.0010 covers this natural, unrefined sulfur per hierarchy excluding processed types.
Unrefined Recovered Sulfur Slabs
Crude sulfur slabs recovered as byproduct from natural gas purification, minimally processed. Classified in HTS 2503.00.0010 as unrefined sulfur, distinct from precipitated forms.
Raw Mined Sulfur Lumps
Large irregular lumps of crude sulfur from open-pit mining operations, uncrushed and unrefined. HTS 2503.00.0010 applies to all crude sulfur excluding refined variants.