3818.00.00

Analysis

HTS 3818.00.00 covers chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics under heading 3818 (chemical elements doped for use in electronics, in the form of discs, wafers or similar…). US Customs collects import statistics for it under 7 ten-digit suffixes, reported in kilograms.

This line's footnotes point to one additional provision in Chapter 99: 9903.90.08 (measures on products of Russia). Chapter 99 duties are added on top of the general rate for goods of the countries they name, and they change more often than the rest of the schedule, so check the current CBP guidance before you rely on a total.

There is no general-rate duty on this line, which puts it with roughly 25% of the 179 tariff lines in chapter 38 that are also free. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.

The ten-digit suffixes separate gallium arsenide wafers, doped, polycrystalline silicon wafers, doped, silicon carbide wafers, doped, round and pseudo-square or rectangular in shape…. The duty is the same across them; the suffix matters for statistics, licensing and some quotas, and an entry needs all ten digits.

It is the only US line under subheading 3818.00, so the six-digit code used by every Harmonized System country and the eight-digit US line describe the same goods; a foreign tariff or an exporter's invoice showing 3818.00 points straight here.

Goods from countries without normal trade relations pay the column 2 rate of 25% instead of nothing, so origin decides between free entry and a 25% duty.