Crude Native Sulfur Ore
Raw sulfur extracted from natural volcanic deposits or caprock formations, containing impurities like dirt and moisture. Classified under HTS 2503.00.00.90 as unrefined sulfur of natural origin, excluding sublimed, precipitated, or colloidal forms per Chapter 25 exclusions.
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 note explicitly excludes these processed forms from Chapter 25, directing to heading 2802.
If containing significant sulfide minerals like pyrite
Roasted iron pyrites primarily for sulfur recovery fall under Chapter 26 as metal ores.
If mixed with earth colors or micaceous iron oxides
Processed mineral mixtures including sulfur impurities classify under heading 2530.
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 purity levels below 99.5% to confirm crude status; refined sulfur may shift to other codes
• Provide geological origin certificates to distinguish from precipitated sulfur excluded in heading 2802
• Ensure bulk packaging documentation avoids misclassification as sublimed sulfur
Related Products under HTS 2503.00.00.90
Recovered Frasch Process Sulfur
Yellow solid sulfur blocks recovered via the Frasch hot-water mining method from underground Gulf Coast salt domes. Falls under HTS 2503.00.00.90 as crude sulfur not further refined, distinct from precipitated forms.
Volcanic Sulfur Crystals
Bright yellow crystalline sulfur formed around fumaroles in active volcanoes like those in Indonesia or Japan. HTS 2503.00.00.90 covers this natural sulfur variety excluding sublimed or colloidal processing.
Bulk Lump Sulfur from Mines
Irregular lumps of native sulfur mined from surface outcrops, typically 99% pure with rock inclusions. Classified in HTS 2503.00.00.90 as other crude sulfur not meeting sublimed or precipitated definitions.
Natural Sulfur Pebbles
Small, rounded natural sulfur pebbles collected from sedimentary deposits, suitable for industrial grinding. HTS 2503.00.00.90 includes these unprocessed forms excluding chapter exclusions.
Caprock Native Sulfur
Native sulfur from limestone caprock formations above salt domes, mined via conventional methods. Under HTS 2503.00.00.90 as other non-sublimed, non-precipitated sulfur.
Polish Native Sulfur Lumps
Native sulfur lumps from Polish Carpathian deposits, valued for low impurity profile in fertilizer production. HTS 2503.00.00.90 covers this European crude sulfur source.