U.S. imports of Alums (HS 283330) totaled $560K in August 2026, imported from 9 countries.
Importers of Alums paid $719 in duties in August 2026, an average duty rate of 0.13% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
22 import shipments a month
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.
ImportsExports
Imports
$560KYoY · free account
Exports
$8KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $7.5M of Alums and exported $484K.
Through August 2026. Source: U.S. Census Bureau.
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Subheading 9 of 10 in heading 2833
Subheading 283330 · $560K of $38.3M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2833300000 | Alums | $560K | 0.13% | 2.57% | $719 |
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 | $8K |
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.
Imports · August 2026
origin
Mexico and Italy together supply 99% of it. India pays 11.6% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
97.4% enters free of duty; duty collected equals 0.13% of imports for consumption.