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Harmonized System
U.S. imports of alums (HS 283330) totaled $725K in July 2026, traded with 8 countries.
Importers of Alums paid $11K in duties in July 2026 — an effective duty rate of 12% on $93K in dutiable value, based on actual customs collections rather than the published tariff schedule. Alums imports of $725K in July 2026 ran 16% above the year-to-date monthly average of $626K.
Last updated: July 2026 dataAlums—double sulfate salts such as potassium alum and ammonium alum—serve as coagulants in water treatment, mordants in textile dyeing, and functional additives in food processing and cosmetics. The entire heading is captured in a single tariff line, 2833300000, with Mexico the leading US import source, followed by France and Spain. Food- and cosmetic-grade alum may require compliance documentation beyond standard customs entry depending on the intended application.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
26 shipments/mo
Yes. The US schedule consolidates all alums, regardless of the specific cation (potassium, ammonium, chromium, etc.), into the single line 2833300000. Importers should ensure the commercial invoice clearly identifies the specific alum type for end-use regulatory purposes, even though the HTS classification does not differentiate.
Food-grade alum used as a firming agent or leavening component is subject to FDA oversight as a food additive. Importers should be prepared to provide certificates of analysis confirming purity and compliance with applicable food-additive regulations; admissibility is complex and consultation with a licensed customs broker or regulatory specialist is advisable.
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Subheading 7 of 10 in heading 2833
Subheading 283330 · $725K 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 |
|---|---|---|---|---|---|
| 2833300000 | Alums | $725K | 1.49% | 12.83% | $11K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2833300000 | Alums | $40K |
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.
ImportsExports
Imports
$725KYoY · Pro
Exports
$40KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Mexico and France together supply 97% of it.
customs district
destination
entry
rate provision · imports
87.2% enters free of duty; the effective duty rate is 1.49%.