2503.00.00.10
Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur / Crude or unrefined sulfur
Classification path
- Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur
- Crude or unrefined sulfur
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- Free
- Unit of quantity
- t
Related lines in heading 2503
About heading 2503
Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur
Heading 2503 covers sulfur of all kinds except the sublimed, precipitated and colloidal forms, which are refined chemical products classified in chapter 28. The heading has two declarable lines: one for crude or unrefined sulfur and one for all other sulfur within the heading. Both lines carry a general (MFN) rate of Free.
Full guide to heading 2503Products in this heading
- Crude sulfur in bulk lumps
- Unrefined sulfur from natural deposits
- Ground sulfur for industrial use
- Sulfur for fertilizer and soil treatment blends
- Sulfur for rubber vulcanization
- Crude sulfur received from petroleum refining as a by-product
- Sulfur powder packed for industrial sale
Frequently asked questions
What is the HTS code for crude sulfur?
Crude or unrefined sulfur is classified under 2503.00.00.10, at a general (MFN) rate of Free.
What is the duty on sulfur under heading 2503?
Both lines of the heading are duty free: 2503.00.00.10 and 2503.00.00.90 each carry a general (MFN) rate of Free.
How do I classify refined sulfur that is not crude?
Refined sulfur that stays within the heading, such as ground or processed sulfur, goes under 2503.00.00.90 at a general (MFN) rate of Free. Sulfur that has been sublimed, precipitated or colloided is excluded and is not classified in heading 2503.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.