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HSChapter 28
U.S. imports of alums (HS 283330) totaled $607K in April 2026, traded with 7 countries.
Importers of Alums paid $11K in duties in April 2026 — an effective duty rate of 12% on $96K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 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.
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.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2833300000 | ALUMS | $607K | 11.60% | $11K |
ALUMS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2833300000 | ALUMS | $31K |
ALUMS
38.1K kg
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 |
|---|---|---|---|
| Ohio | $340K | -- | -$340K |
| North Carolina | $88K | -- | -$88K |
| New York | $57K | -- | -$57K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| EAGLE PASS, TX | $248K | -- | -$248K |
| LAREDO, TX | $206K | $6K | -$200K |
| SAVANNAH, GA | $73K | -- | -$73K |