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HSChapter 28
U.S. imports of sulfites (excluding sodium sulfites) (HS 283220) totaled $108K in April 2026, traded with 5 countries.
Importers of Sulfites (Excluding Sodium Sulfites) paid $16K in duties in April 2026 — an effective duty rate of 14% on $108K in dutiable value, based on actual customs collections rather than the published tariff schedule. Sulfites (Excluding Sodium Sulfites) imports of $108K in April 2026 ran 47% above the year-to-date monthly average of $73K.
Last updated: April 2026 dataCalcium sulfite, potassium sulfite, and other non-sodium sulfite salts fall under this heading, consolidated into a single tariff line (2832200000) in the US schedule. These compounds serve as antioxidants and preservatives in food and beverage applications, as well as reducing agents in chemical manufacturing. Italy and France are the leading US suppliers, reflecting European chemical production strength in specialty inorganic salts.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The critical distinction is the cation: sodium sulfites are classified under 2832100000 (heading 283210), while all other sulfite salts — including calcium, potassium, and ammonium sulfites — fall under 2832200000. When the commercial invoice lists a sulfite compound, importers should confirm the metal counterion before declaring the HTS code.
Sulfite compounds intended for use as food additives or preservatives may be subject to FDA oversight under the Federal Food, Drug, and Cosmetic Act. Importers should ensure that food-grade shipments are accompanied by appropriate documentation and that the product meets applicable food additive regulations. Consult a licensed customs broker or FDA-registered agent for admissibility guidance.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2832200000 | OTHER SULFITES, EXCEPT SODIUM SULFITES, NESOI | $108K | 14.43% | $16K |
OTHER SULFITES, EXCEPT SODIUM SULFITES, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2832200000 | OTHER SULFITES, EXCEPT SODIUM SULFITES, NESOI | $1.3M |
OTHER SULFITES, EXCEPT SODIUM SULFITES, NESOI
2.0M 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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| EL PASO, TX | -- | $632K | +$632K |
| PORT HURON, MI | -- | $267K | +$267K |
| LAREDO, TX | -- | $169K | +$169K |