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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If purified beyond crude extraction
Any refining like melting or distillation moves it from crude sulfur (2503) to Chapter 28 chemicals.
If recovered from petroleum or bituminous minerals
Sulfur from petrochemical byproducts is classified under petroleum bitumen derivatives in 2713.
If chemically prepared for specific industrial formulas
Prepared chemical sulfur preparations fall outside Chapter 25 into 3824.
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Import Tips & Compliance
• Include Frasch process certification to distinguish from refined; impurities must not exceed natural levels
• Declare exact moisture and dirt content to prevent disputes over 'crude' vs refined status
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.
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.