1C226 Category 1C

Tungsten, tungsten carbide, and alloys containing more than 90% tungsten by weight, having both of the following characteristics (see List of Items Controlled).

Category 1: Special Materials and Related Equipment, Chemicals, “Microorganisms,” and “Toxins”

Reasons for control

NP: Nuclear nonproliferation
AT: Anti-terrorism

Country chart

Control	Column
AT applies to entire entry	AT 1
NP applies to entire entry	NP 1

List-based license exceptions

Exception	As stated in the entry
GBS	N/A
LVS	N/A

Items

ECCN Controls: This entry does not control manufactures “specially designed” as weights or gamma-ray collimators.
Items: a. In forms with a hollow cylindrical symmetry (including cylinder segments) with an inside diameter between 100 and 300 mm; and
b. A mass greater than 20 kg.

Related controls

See ECCNs 1E001 (“development” and “production”) and 1E201 (“use”) for technology for items controlled by this entry.

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.