HTS heading 3818 · Chapter 38, Miscellaneous chemical products
US imports of Chemical elements doped for use in electronics
Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
US imports under HTS 3818 at a glance
Between March and July 2026, US importers entered $828 million of chemical elements doped for use in electronics under HTS heading 3818, from 31 of the 55 origin countries covered here and across 8 ten-digit tariff lines — roughly $166 million a month of customs value under a single four-digit heading.
Heading 3818 sits in chapter 38, miscellaneous chemical products, so anything classified here shares a duty structure with the rest of that chapter.
Top origin countries by share of HTS 3818
Origin countries: value, share and duty paid
| Origin | Import value | Share | Dutiable share | Effective duty | Duty per $100 | Detail |
|---|---|---|---|---|---|---|
| Japan | $258 million | 31.1% | 0.3% | 10.29% | $0.03 | Duty on 3818.00.00 |
| Taiwan | $245 million | 29.5% | 0.2% | 10% | $0.02 | Duty on 3818.00.00 |
| South Korea | $78.3 million | 9.5% | 0.4% | 10% | $0.04 | Duty on 3818.00.00 |
| Germany | $49.5 million | 6% | 0.4% | 10% | $0.04 | Duty on 3818.00.00 |
| France | $45.0 million | 5.4% | 0.1% | 10% | $0.02 | Duty on 3818.00.00 |
| Singapore | $39.0 million | 4.7% | 0% | 0% | $0.00 | Duty on 3818.00.00 |
| China | $36.0 million | 4.3% | 46.8% | 48.99% | $22.93 | Duty on 3818.00.00 China lane |
| Malaysia | $16.2 million | 1.9% | 0.4% | 10% | $0.03 | Duty on 3818.00.00 |
| United Kingdom | $16.0 million | 1.9% | 0.2% | 10% | $0.02 | Duty on 3818.00.00 |
| Italy | $12.1 million | 1.5% | 1.8% | 10% | $0.18 | Duty on 3818.00.00 Italy lane |
| Vietnam | $10.7 million | 1.3% | 0.3% | 10% | $0.03 | Duty on 3818.00.00 Vietnam lane |
| Finland | $7.7 million | 0.9% | 1.1% | 10% | $0.11 | Duty on 3818.00.00 |
| Czechia | $4.6 million | 0.6% | 0.2% | 10% | $0.02 | Duty on 3818.00.00 |
| Switzerland | $2.6 million | 0.3% | 0% | 0% | $0.00 | Duty on 3818.00.00 |
| Indonesia | $1.8 million | 0.2% | 0% | 0% | $0.00 | Duty on 3818.00.00 Indonesia lane |
Who exports chemical elements doped for use in electronics to the United States
Japan, Taiwan and South Korea together account for 70.1% of the heading. Japan leads with $258 million (31.1%), ahead of Taiwan at 29.5% and South Korea at 9.5%. Concentrated but not captive: alternatives exist, and buyers who qualify a second origin early keep some leverage when duties move.
Asian origins supply 77.9% of the heading, led by Japan, Taiwan, South Korea and China. That means ocean transit from Asian base ports and, for most of these countries, no free-trade-agreement relief — so the tariff line you classify into carries the full cost.
What importers actually paid in duty
Most of this heading enters duty-free. Only 2.4% of the entered value was dutiable, and across all origins CBP collected $8.5 million — about $1.03 of duty per $100 of goods. The headline rate on the dutiable portion was 43.7%, but it applies to a small slice, so the number that matters to a landed-cost model is the $1.03.
The spread between origins is real. Among origins with at least 2% of the heading, China paid the most duty relative to value — $22.93 per $100 — while Singapore paid $0.00. On a $250,000 purchase order that gap is about $57,000 in duty alone, which is worth pricing into a sourcing decision rather than discovering on the entry summary.
10-digit tariff lines under HTS 3818
| HTS code | Description | Import value | Share | Duty per $100 | Largest origin |
|---|---|---|---|---|---|
| 3818.00.00.95 | Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics | $443 million | 53.5% | $1.00 | Japan |
| 3818.00.00.20 | Polycrystalline silicon wafers, doped | $206 million | 24.8% | $0.32 | Taiwan |
| 3818.00.00.91 | Other | $71.1 million | 8.6% | $1.29 | South Korea |
| 3818.00.00.10 | Gallium arsenide wafers, doped | $46.5 million | 5.6% | $0.01 | Taiwan |
| 3818.00.00.40 | Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics | $37.6 million | 4.5% | $0.93 | Japan |
| 3818.00.00.30 | Silicon carbide wafers, doped | $21.1 million | 2.5% | $9.96 | Japan |
| 3818.00.00.50 | Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics | $3.1 million | 0.4% | $1.04 | France |
| 3818.00.00.45 | Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics | $33,000 | 0% | $50.00 | China |
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
The 10-digit lines under heading 3818
8 ten-digit lines carried trade under this heading in the period. The largest, 3818.00.00.95 (chemical elements doped for use in electronics, in the form of discs), took 53.5% of the heading at $443 million. 3818.00.00.20, 3818.00.00.91 and 3818.00.00.10 follow. Rates diverge between those lines, so the classification your broker files is worth checking against the goods rather than carried over from the last entry.
What the duty stack looks like
The rate on an entry is not one number. It is a stack: the general (column 1) rate for the 10-digit line, less any trade-agreement preference the goods qualify for, plus whatever additional duties apply to that product and origin, all applied to the customs value declared. The $1.03 per $100 above is what that stack averaged across every entry in this heading — a benchmark, not a quote.
For the origins carrying the most volume, the per-country breakdowns go a level deeper: Japan (3818.00.00), Taiwan (3818.00.00) and South Korea (3818.00.00). To price a specific shipment, put your 10-digit code and country of origin into the tariff simulator.
What this means for your next shipment
Classify first, confirm origin second, quote freight third. A heading like 3818 rewards that order, because the duty differences between lines and between origins are usually larger than the freight differences on the same lane. Airlift USA handles the freight and coordinates classification and entry through our licensed broker network.
For the operational side rather than the tariff side, see the Industrial & Chemical Supplies (Non-DG) guide for how this cargo moves, the China to USA lane for transit times and ports and the heading index to compare against the rest of chapter 38.
Price a shipment under HTS 3818
Airlift USA has moved ocean and air freight into the United States since 1999 and coordinates HTS classification, ISF and entry filing through our licensed broker network.
Methodology
Figures come from the U.S. Census Bureau's international trade statistics for imports for consumption — the customs value of goods entered into US commerce, not shipments in transit or goods held in bonded warehouses. The period is March–July 2026 (5 months of data), and coverage is limited to 55 major origin countries, so totals here are lower than published US-wide totals for the same heading.
Three quantities are additive and everything else is derived from them: entered customs value, dutiable value and calculated duty. Effective duty is calculated duty divided by dutiable value — the rate CBP actually applied to the part of the trade that was dutiable. Dutiable share is dutiable value divided by entered value; below 20% it means the trade entered mostly free, under a trade agreement or a duty-free provision. Duty per $100 spreads calculated duty across all entered value, which is the figure comparable between origins.
Chapter 98 and chapter 99 are excluded: those are special classification and temporary-measure provisions rather than product headings. Heading and tariff-line descriptions are the current HTS text. Values are historical and reflect duty as calculated at the time of entry; they are not a quote and not a prediction of the rate on a future shipment.
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value. Census data is a work of the US government and is in the public domain.
Frequently asked questions
Which countries export the most chemical elements doped for use in electronics to the United States?
Japan is the largest origin under HTS heading 3818, with $258 million entered between March and July 2026, or 31.1% of the heading. Taiwan follows at 29.5% and South Korea at 9.5%. Figures cover the 55 major origin countries in this dataset. Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
How much import duty is paid on chemical elements doped for use in electronics under HTS 3818?
Across all origins, 2.4% of the entered value was dutiable and CBP calculated $8.5 million of duty over the five months — an effective 43.7% on dutiable value, or about $1.03 per $100 of goods across the whole heading. Your own rate depends on the exact 10-digit line and country of origin.
Which HTS codes fall under heading 3818?
Heading 3818 covers chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics. 8 ten-digit lines recorded imports in this period; the largest by value were 3818.00.00.95, 3818.00.00.20, 3818.00.00.91 and 3818.00.00.10. Duty rates differ between those lines, so the 10-digit classification matters more than the heading.
Which origin pays the lowest duty on chemical elements doped for use in electronics?
Among origins with at least 2% of the heading, Singapore paid the least duty relative to entered value — about $0.00 per $100 of goods, with 100% of its value entering free. Duty is only one part of landed cost, and a claim has to be substantiated at entry to be allowed.
How do I check the duty on my own shipment?
Use the Airlift USA tariff simulator with your 10-digit HTS code and country of origin to see the duty stack that applies today, then confirm the classification before you file. Airlift USA coordinates classification and entry filing through our licensed broker network and can review the code against your product specification.