Caprock Native Sulfur
Native sulfur extracted from limestone caprock formations above salt domes, mined via conventional methods. This crude sulfur is not sublimed or precipitated and is classified under tariff item 2503.00.00 as other non-sublimed, non-precipitated sulfur.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the sulfur is further processed into sublimed, precipitated, or colloidal forms
Chapter 25 Note 2(a) removes these sulfur types from the chapter, directing them to heading 28.02.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify the sulfur has not undergone roasting, calcination, or mixing, as such processing would exclude it from Chapter 25
• Keep records of the mining method to demonstrate it is native sulfur
• Consult the CBSA if the sulfur contains impurities that could affect classification
Related Products under Tariff item 2503.00.00
Bolivian Huari Huari Sulfur
High-purity native sulfur from the Huari Huari mine in Bolivia, hand-collected from high-altitude lagoons. The sulfur is in a crude state with minimal processing, and it is not sublimed, precipitated, or colloidal, so it is classifiable under 2503.00.00.
Bulk Crushed Sulfur Rock
Bulk crushed sulfur rock, mined and crushed from native sulfur deposits, used directly in sulfuric acid production. The crushing process is a permitted mechanical treatment under Chapter 25 Note 1, and the product is not sublimed, precipitated, or colloidal sulfur, so it falls under tariff item 2503.00.00.
Bulk Lump Sulfur from Mines
Irregular lumps of native sulfur mined from surface outcrops, typically 99% pure with rock inclusions. This crude form of sulfur has not been sublimed, precipitated, or subjected to any processing beyond washing or crushing, and therefore falls under tariff item 2503.00.00.
Crude Native Sulfur Ore
Raw sulfur extracted from natural volcanic deposits or caprock formations, containing impurities like dirt and moisture. This unrefined sulfur of natural origin is not sublimed or precipitated, and is classified under tariff item 2503.00.00.
Crude Natural Sulfur Ore
Crude natural sulfur ore extracted from volcanic or underground deposits, containing impurities like soil and moisture. It is in a crude state with no processing beyond washing or mechanical separation, consistent with Chapter 25 Note 1, and is not an excluded form, so it is classifiable under 2503.00.00.
Frasch Process Crude Sulfur
Yellowish sulfur blocks mined via the Frasch hot-water process from underground domes, unrefined with minor impurities. The product is crude sulfur, not sublimed, precipitated, or colloidal, and the mining process is a physical extraction, so it falls under 2503.00.00.