Synthetic Anhydrite Fines
Fine anhydrite powder from industrial byproducts, chemically equivalent to natural but origin differs. Still classified under HTS 2520.10.00.00 if unprocessed anhydrite form. Used in specialty cements.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If industrial waste residue
Other industrial residues containing anhydrite classify under heading 2621.
If cement clinker component
Anhydrite used in cement production becomes part of clinker classification.
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Import Tips & Compliance
• Production process documentation proving no further refinement beyond natural equivalent
• Safety Data Sheets mandatory for industrial byproduct origins
• Contaminant testing for heavy metals common in synthetic sources
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.
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.
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.