Magnesium Sulfate Heptahydrate (Epsom Salt)
Magnesium sulfate heptahydrate, commonly known as Epsom salt, is a chemically defined inorganic salt of magnesium with the formula MgSO4·7H2O. It falls under HTS 2833.21.00.00 as a sulfate of magnesium, used in bath salts, gardening, and as a laxative. This crystalline compound is hydrated and meets Chapter 28 definitions for classification here.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If blended with mineral/chemical fertilizers for agricultural use
Fertilizer mixtures containing magnesium sulfate fall under Chapter 31, not pure inorganic compounds of Chapter 28.
If put up for retail sale in bath preparations
Perfumed bath salts exceed pure chemical scope, classified as pre-shampoo or bath preparations in Chapter 33.
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Import Tips & Compliance
• Verify purity and hydration state via lab analysis to confirm 'chemically defined' status; provide Certificate of Analysis (CoA) for customs; watch for fertilizer blends that shift to Chapter 31
Related Products under HTS 2833.21.00.00
Anhydrous Magnesium Sulfate
Anhydrous magnesium sulfate (MgSO4) is a dry, white powder used as a desiccant in labs and pharmaceuticals. Classified under HTS 2833.21.00.00 as a chemically defined sulfate of magnesium per Chapter 28 notes. It absorbs moisture without forming hydrates during standard handling.
Magnesium Sulfate Monohydrate
Magnesium sulfate monohydrate (MgSO4·H2O), or kieserite, is used in fertilizers and animal feed supplements. It is a sulfate of magnesium under HTS 2833.21.00.00, chemically defined without organic stabilizers. This form is less hydrated than Epsom salt but retains sulfate structure.
Pharmaceutical Grade Magnesium Sulfate
USP-grade magnesium sulfate is a purified heptahydrate used in IV solutions and medical applications. It qualifies under HTS 2833.21.00.00 as a chemically defined magnesium sulfate, excluding organo-inorganic compounds per Chapter notes. High purity ensures medical compliance.
Technical Grade Magnesium Sulfate
Technical grade MgSO4·7H2O is used in industrial processes like paper production and textiles. Classified in HTS 2833.21.00.00 as a magnesium sulfate, chemically defined without Chapter exclusions. Lower purity than pharma but suitable for bulk applications.
Food Grade Magnesium Sulfate
FCC-grade magnesium sulfate serves as a firming agent in canned vegetables and nutritional supplements. Under HTS 2833.21.00.00 as a chemically defined inorganic magnesium sulfate. Meets food chemical codex standards without organic additives.
Magnesium Sulfate for Fireworks
High-purity magnesium sulfate used in pyrotechnic formulations as an oxidizer component. Falls under HTS 2833.21.00.00 as a sulfate of magnesium, chemically defined per Chapter 28. Supplied in granular form for safe industrial blending.