Raw Gypsum Powder
Gypsum ore ground into fine powder without calcination or additives. HTS 2520.10.00.00 applies to this unprocessed form used in plaster production, animal feed, and water treatment. Not to be confused with finished plasters.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If calcined into plaster
Any heating to remove water classifies as calcined gypsum or plasters in subheading 2520.20.
If refined sulfate salts
High-purity gypsum chemically processed becomes calcium sulfate salts in Chapter 28.
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Import Tips & Compliance
• Specify grind size (e.g
• 200 mesh) and confirm no heat treatment to maintain crude classification
• Anti-dumping documentation if sourced from certain countries like China or Thailand
• Dust suppression measures required for fine powders to meet health and safety import standards
Related Products under HTS 2520.10.00.00
Natural Gypsum Rock
Raw gypsum ore extracted from natural deposits, primarily calcium sulfate dihydrate in crystalline form. It falls under HTS 2520.10.00.00 as unprocessed gypsum, distinct from calcined plasters or anhydrite. Used as the base material for plasterboard and cement production.
Gypsum Lumps
Crushed gypsum in irregular lump form, minimally processed after mining but not ground or calcined. Classified under HTS 2520.10.00.00 as crude gypsum suitable for grinding into powder or direct use in agriculture. Ideal for soil amendment due to its sulfur content.
Anhydrite Mineral
Natural anhydrite (calcium sulfate without water of crystallization) mined as a rock or powder. Directly covered by HTS 2520.10.00.00 alongside gypsum, used in cement production and as a drying agent. Distinguished from gypsum by lower water content.
Agricultural Gypsum Pellets
Pelletized natural gypsum for soil pH adjustment and sulfur supplementation. Remains under HTS 2520.10.00.00 as uncalcined gypsum, valued in farming for improving clay soils. Pelleting is mechanical, not chemical processing.
Construction Grade Gypsum
High-purity gypsum lumps selected for wallboard manufacturing. HTS 2520.10.00.00 covers this crude form before calcining into stucco. Essential raw material for drywall production.
White Hills Gypsum Ore
Premium white gypsum ore from specific deposits like White Hills, Arizona, prized for purity. Falls squarely under HTS 2520.10.00.00 as natural gypsum for high-end plaster applications. Minimal impurities make it ideal for fine plasters.