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HSChapter 28
U.S. imports of disodium sulfate (sodium sulfate) (HS 283311) totaled $1.1M in April 2026, traded with 11 countries.
Importers of Disodium Sulfate (Sodium Sulfate) paid $30K in duties in April 2026 — an effective duty rate of 10% on $288K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataDisodium sulfate — commercially known as Glauber's salt in its hydrated form — is a high-volume industrial chemical used in detergent manufacturing, kraft pulp processing, and glass production. The US schedule distinguishes salt cake (a crude, lower-purity form used in pulp mills, classified under 2833111000) from refined grades, and further separates anhydrous disodium sulfate (2833115010) from other forms (2833115050). Canada is the leading US supplier, a position supported by proximity and USMCA trade terms, with China and India also significant sources.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Salt cake (2833111000) refers to crude sodium sulfate, typically a byproduct of hydrochloric acid production or other industrial processes, with lower purity and used primarily in kraft pulp mills. Refined disodium sulfate — whether anhydrous (2833115010) or in other forms (2833115050) — is a higher-purity product used in detergents and glass. The distinction is based on purity and processing, and importers should document the grade clearly on the commercial invoice.
Anhydrous sodium sulfate is hygroscopic and must be stored in sealed, moisture-resistant packaging to prevent caking and weight gain. While it is not classified as a hazardous material under standard DOT rules, importers should confirm packaging integrity and moisture content specifications with the supplier, as these affect product quality and potential reclassification disputes.
Monthly import values over time
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $811K | $48K | -$763K |
| MEXICO | $33K | $357K | +$323K |
| IRELAND | -- | $377K | +$377K |
| POLAND | -- | $352K | +$352K |
| CZECH REPUBLIC | $90K | -- | -$90K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2833115010 | ANHYDROUS DISODIUM SULFATE | $1.0M | 10.95% | $22K |
| 2833115050 | DISODIUM SULFATE, NESOI | $111K | 8.84% | $7K |
| 2833111000 | SALT CAKE OF DISODIUM SULFATE | $8K | 10.00% | $843 |
ANHYDROUS DISODIUM SULFATE
DISODIUM SULFATE, NESOI
SALT CAKE OF DISODIUM SULFATE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2833115000 | DISODIUM SULFATE, EXCEPT SALT CAKE, NESOI | $1.1M |
| 2833111000 | SALT CAKE OF DISODIUM SULFATE | $147K |
DISODIUM SULFATE, EXCEPT SALT CAKE, NESOI
1.2M kg
SALT CAKE OF DISODIUM SULFATE
1.1K t
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
ANHYDROUS AMMONIA
HS 281410
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
SILICON, UNDER 99.99% (BY WEIGHT) SILICON
HS 280469
PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS
HS 280920
| State | Imports | Exports | Balance |
|---|---|---|---|
| New Jersey | $38K | $606K | +$568K |
| Missouri | $288K | $208K | -$80K |
| Kansas | -- | $244K | +$244K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| PORTAL, ND | $574K | -- | -$574K |
| NORFOLK-NEWPORT NEWS, VA | $59K | $187K | +$128K |
| CHESTER, PA | -- | $242K | +$242K |