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HSChapter 25
U.S. imports of gypsum & anhydrite (HS 252010) totaled $8.9M in April 2026, traded with 12 countries.
Last updated: April 2026 dataNatural gypsum (calcium sulfate dihydrate) and anhydrite (anhydrous calcium sulfate) are foundational minerals for the construction and building products industries, classified under tariff line 2520100000. Mexico is the leading US supplier, a position reinforced by large Baja California deposits and short overland and maritime shipping distances to US wallboard manufacturers. Canada and Spain are secondary sources. Importers should distinguish natural gypsum from synthetic gypsum (a byproduct of flue-gas desulfurization), as synthetic material may classify differently depending on its form and processing state.
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Natural gypsum and anhydrite are minerals of geological origin and classify under 2520100000. Synthetic gypsum — produced as a byproduct of industrial processes such as flue-gas desulfurization or phosphoric acid production — is generally classified elsewhere (often in Chapter 28 or 38 depending on its form and purity). The origin of the calcium sulfate (geological versus industrial byproduct) is the key classification question, and a chemical analysis certificate can support the correct determination.
Wallboard (drywall) manufacturing is the dominant end use, consuming the largest share of imported gypsum. Cement production uses gypsum as a set-retarder additive. Agricultural applications include soil amendment to improve drainage and reduce sodium content. Anhydrite specifically is used in flooring screeds and as a binder in specialty construction products.
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Monthly import values over time