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HSChapter 28
U.S. imports of sulfides and polysulfides (other) (HS 283090) totaled $2.3M in April 2026, traded with 16 countries.
Importers of Sulfides and Polysulfides (Other) paid $244K in duties in April 2026 — an effective duty rate of 11% on $2.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Sulfides and Polysulfides (Other) imports of $2.3M in April 2026 ran 31% above the year-to-date monthly average of $1.7M.
Last updated: April 2026 dataZinc sulfide in luminescent grade (purity exceeding 99.99% by weight, classified under 2830901000) is the most specification-sensitive line here, used in phosphor screens, optical coatings, and infrared windows — a very different commercial profile from the general-purpose zinc sulfide (2830901500) and the catch-all sulfides and polysulfides line (2830909000). Germany and Japan are the leading US suppliers, reflecting the advanced-chemical manufacturing base required for high-purity grades. Importers should confirm whether the purity threshold is met by certified analysis, as misclassification between the luminescent and non-luminescent zinc sulfide lines can affect duty treatment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The key criterion is purity: zinc sulfide with a purity exceeding 99.99% by weight qualifies as luminescent grade under 2830901000. Importers should provide a certified chemical analysis or certificate of conformance to support this classification at entry.
The residual line covers a broad range of inorganic sulfides used in rubber vulcanization, mining flotation reagents, pigment production, and specialty chemical synthesis. The specific end-use determines which downstream regulations or export controls may apply.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| AUSTRIA | $751K | -- | -$751K |
| KOREA, SOUTH | $190K | $541K | +$351K |
| MEXICO | -- | $492K | +$492K |
| JAPAN | $432K | $6K | -$427K |
| UNITED KINGDOM | -- | $327K | +$327K |
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 |
|---|---|---|---|---|
| 2830909000 | SULFIDES AND POLYSULFIDES, NESOI | $1.9M | 11.55% | $206K |
| 2830901000 | ZINC SULFIDE LUMIN GRD PURITY > 99.99% BY WT | $353K | 8.41% | $30K |
| 2830901500 | ZINC SULFIDE, NESOI | $66K | 12.80% | $8K |
SULFIDES AND POLYSULFIDES, NESOI
ZINC SULFIDE LUMIN GRD PURITY > 99.99% BY WT
ZINC SULFIDE, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2830901000 | ZINC SULFIDE LUMIN GRD PURITY > 99.99% BY WT | $1.1M |
| 2830909000 | SULFIDES AND POLYSULFIDES, NESOI | $699K |
| 2830901500 | ZINC SULFIDE, NESOI | $410K |
ZINC SULFIDE LUMIN GRD PURITY > 99.99% BY WT
31.9K kg
SULFIDES AND POLYSULFIDES, NESOI
466.8K kg
ZINC SULFIDE, NESOI
564.1K 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 |
|---|---|---|---|
| Pennsylvania | $194K | $626K | +$432K |
| Tennessee | $604K | -- | -$604K |
| California | $432K | $108K | -$325K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $698K | -- | -$698K |
| NEW ORLEANS, LA | $37K | $519K | +$482K |
| EL PASO, TX | -- | $447K | +$447K |