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2528.00.00.50/Sassolite Natural Boric Acid Crystals/Mexico

Sassolite Natural Boric Acid Crystals from Mexico

Sassolite consists of natural boric acid (H3BO3) crystals from volcanic fumaroles, capped at 85% purity for this category. Used in pharmaceuticals and antiseptics precursors. HTS 2528.00.0050 includes this as natural boric acid not exceeding the purity limit, distinct from synthetic.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Provide volcanic deposit certification and purity assay; segregate from >85% batches

• Use moisture-proof packaging as crystals are hygroscopic