Frasch Process Sulfur from Mexico
Molten sulfur extracted via the Frasch hot-water mining method from underground deposits, solidified into blocks. It qualifies under 2503.00.00 as natural sulfur, distinct from chemically precipitated or sublimed varieties.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Submit process flow diagrams confirming no chemical precipitation to comply with exclusions
• Account for high-temperature shipping requirements in container declarations