Key facts
- HS subheading
- 3818.00
- Duty (MFN)
- Free
- National lines
- 7
- Tariff
- United States
- Chapter
- 38: Miscellaneous chemical products
Summary
The United States tariff splits HS 3818.00 (chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics) into 7 national lines: 3818.00.00.10 (gallium arsenide wafers, doped), 3818.00.00.20 (polycrystalline silicon wafers, doped), 3818.00.00.30 (silicon carbide wafers, doped), 3818.00.00.40 (round (circular) shaped, as described in statistical note 2 to this chapter) and 3 others. Every United States line under 3818.00 is free of general (MFN) duty.
United States lines under 3818.00
The United States tariff splits HS 3818.00 (chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics) into 7 national lines: 3818.00.00.10 (gallium arsenide wafers, doped), 3818.00.00.20 (polycrystalline silicon wafers, doped), 3818.00.00.30 (silicon carbide wafers, doped), 3818.00.00.40 (round (circular) shaped, as described in statistical note 2 to this chapter) and 3 others.
Every United States line under 3818.00 is free of general (MFN) duty.
- 3818.00.00.10Gallium arsenide wafers, dopedDuty: Free
- 3818.00.00.20Polycrystalline silicon wafers, dopedDuty: Free
- 3818.00.00.30Silicon carbide wafers, dopedDuty: Free
- 3818.00.00.40Round (circular) shaped, as described in statistical note 2 to this chapterDuty: Free
- 3818.00.00.45Pseudo-square or rectangular in shape, as described in statistical note 3 to this chapterDuty: Free
- 3818.00.00.50OtherDuty: Free
- 3818.00.00.91OtherDuty: Free
In other countries
No other national tariff on border.bot has live lines under 3818.00 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have under HS 3818.00?
The United States tariff splits HS 3818.00 (chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics) into 7 national lines: 3818.00.00.10 (gallium arsenide wafers, doped), 3818.00.00.20 (polycrystalline silicon wafers, doped), 3818.00.00.30 (silicon carbide wafers, doped), 3818.00.00.40 (round (circular) shaped, as described in statistical note 2 to this chapter) and 3 others.
What is the duty on HS 3818.00 in the United States?
Every United States line under 3818.00 is free of general (MFN) duty.
Sources and updates
The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
This page was last updated on 9 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.
Official source files: