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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sublimed, precipitated, or colloidal
Chapter 25 explicitly excludes these processed sulfur forms, directing them to heading 2802.
If containing 70%+ iron evaluated as Fe2O3
Such sulfur-bearing earth colors are classified as mineral earth colors under 2530 per Chapter exclusions.
If roasted/sintered for sulfur recovery from sulfide ores
Roasted sulfide ores producing sulfur fall under coal tar oils or roasted products in Chapter 26.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify sulfur content via assay certificates to confirm crude status and avoid reclassification to refined sulfur (2802)
• Provide geological source documentation, as native sulfur from specific mines may qualify for preferential tariffs
Related Products under HTS 2503.00.00.10
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.