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HSChapter 28
U.S. imports of magnesium sulfate (HS 283321) totaled $1.6M in July 2026, traded with 19 countries.
Importers of Magnesium Sulfate paid $133K in duties in July 2026 — an effective duty rate of 10% on $1.3M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataMagnesium sulfate — commercially known in heptahydrate form as Epsom salt — serves a broad range of industrial, agricultural, and pharmaceutical end uses, from fertilizer micronutrient supplementation and industrial drying agents to bath and personal care products. Classified under a single US 10-digit line (2833210000), the heading does not subdivide by grade or hydration state, making product specification documentation critical for buyers distinguishing food-grade, USP, or technical-grade material. China is the dominant global supplier and the leading US import source, followed by Japan and Germany. Importers sourcing Chinese-origin material should assess Section 301 tariff exposure, which has applied to this product.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
92 shipments/mo
No — the single 10-digit line 2833210000 covers all forms of magnesium sulfate regardless of hydration state. Buyers must rely on commercial invoices, certificates of analysis, and purchase specifications to differentiate heptahydrate (Epsom salt), monohydrate, and anhydrous grades, as the tariff schedule does not make that distinction.
USP-grade magnesium sulfate intended for pharmaceutical manufacturing is subject to FDA oversight. Importers generally need a certificate of analysis confirming USP specifications, documentation of the foreign manufacturer's GMP compliance, and may be subject to FDA examination at the port of entry. Working with a customs broker experienced in pharmaceutical chemicals is advisable.
Subheading 3 of 10 in heading 2833
Subheading 283321 · $1.6M of $36.2M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2833210000 | Magnesium Sulfate | $1.6M | 8.49% | 82.35% | $133K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2833210000 | Magnesium Sulfate | $647K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
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ImportsExports
Imports
$1.6MYoY · Pro
Exports
$647KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Japan and China together supply 60% of it.
customs district
destination
entry
rate provision · imports
17.6% enters free of duty; the effective duty rate is 8.49%.