ECCN
Not legal advice. Tariffkit is a free research tool. It quotes HTS rate text and ECCN control text as published by the official sources linked here. It does not classify an item, does not apply rulings, and does not calculate duty. Verify the cited release with those sources and with counsel before you rely on it.
3A233
3A233 Mass spectrometers, capable of measuring ions of 230 u or greater and having a resolution of better than 2 parts in 230, and ion sources therefor, excluding items that are subject to the export licensing authority of the Nuclear Regulatory Commission (see 10 CFR part 110).
- Category
- Category 3—Electronics
- Product group
- A. “End Items,” “Equipment,” “Accessories,” “Attachments,” “Parts,” “Components,” and “Systems”
Reason for Control
- NP
- AT
Official text
License Requirements
Reason for Control:
NP, AT
Control(s) Country chart (see supp. No. 1 to part 738)
- NP applies to entire entry NP Column 1.
- AT applies to entire entry AT Column 1.
List Based License Exceptions (See Part 740 for a Description of All License Exceptions)
LVS: N/A
GBS: N/A
List of Items Controlled
Related Controls: (1) See ECCNs 3E001 (“development” and “production”) and 3E201 (“use”) for technology for items controlled under this entry. (2) Mass spectrometers “specially designed” or prepared for analyzing on-line samples of UF6 gas streams are subject to the export licensing authority of the Nuclear Regulatory Commission (see 10 CFR part 110).
Related Definitions: N/A
Items:
a. Inductively coupled plasma mass spectrometers (ICP/MS);
b. Glow discharge mass spectrometers (GDMS);
c. Thermal ionization mass spectrometers (TIMS);
d. Electron bombardment mass spectrometers having both of the following features:
d.1. A molecular beam inlet system that injects a collimated beam of analyte molecules into a region of the ion source where the molecules are ionized by an electron beam; and
d.2. One or more cold traps that can be cooled to a temperature of 193 K (−80 °C) or less in order to trap analyte molecules that are not ionized by the electron beam;
e. Mass spectrometers equipped with a microfluorination ion source designed for actinides or actinide fluorides.
Technical Notes:
1. ECCN 3A233.d controls mass spectrometers that are typically used for isotopic analysis of UF6 gas samples.
2. Electron bombardment mass spectrometers in ECCN 3A233.d are also known as electron impact mass spectrometers or electron ionization mass spectrometers.
3. In ECCN 3A233.d.2, a “cold trap” is a device that traps gas molecules by condensing or freezing them on cold surfaces.
For the purposes of this ECCN, a closed-loop gaseous helium cryogenic vacuum pump is not a cold trap.
ecfr-15cfr774-supp1-2026-08-28 · effective 2026-08-28
Issue date 2026-08-28. Amendment date 2026-08-28.
- eCFR Commerce Control List (15 CFR 774, Supplement No. 1)www.ecfr.gov
- eCFR versioner XML captured at ingestwww.ecfr.gov
This page quotes the loaded release. A shareable report freezes this text.
Was this helpful?
A short note about this page. Not shown on the site.