1C241 Category 1C

Rhenium and alloys containing rhenium (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

List-based license exceptions

Items

1. Items: a. Rhenium and alloys containing rhenium, as follows, having both of the characteristics described in 1C241.b:
2. a.1. Alloys containing 90% by weight or more of rhenium;
3. a.2. Alloys containing 90% by weight or more of any combination of rhenium and tungsten; and
4. b. Having both of the following characteristics:
5. b.1. In forms with a hollow cylindrical symmetry (including cylinder segments) with an inside diameter between 100 mm and 300 mm; and
6. b.2. A mass greater than 20 kg.

Related controls

N/A

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