Unexpanded Perlite Rock from Mexico
Crude perlite ore in loose rock or granular form, unheated and unexpanded, directly from volcanic deposits. Falls under HTS 2530.10.00.00 as unexpanded perlite, a lightweight siliceous mineral used in filtration, insulation, and horticulture after expansion.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include assay reports showing amorphous silica content >70% to confirm perlite classification
• Declare as unexpanded to avoid duties on expanded forms; inspect shipments for accidental pre-heating
• Comply with EPA regulations if trace asbestos is present in natural deposits