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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If precipitated from H2S scrubbing
Precipitated sulfur explicitly excluded from Chapter 25 to 2802.
If halogenated or converted to sulfides
Chemical conversion changes it from crude mineral to inorganic chemical in 2813.
If for use in chemical reagent preparations
Prepared chemical products of sulfur shift to 3824.
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
• Submit process flow diagrams showing no precipitation step to stay in 2503
• Bundle with origin declarations for GSP eligibility on developing country sources
Related Products 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.
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.