UN2201 — Nitrous oxide, refrigerated liquid

Class 2.2

Quick facts: UN2201

What it is
Nitrous oxide, refrigerated liquid
Hazard class
2.2 (subsidiary 5.1)
Packing group
None assigned
Label
Division 2.2 - Non-flammable, Non-toxic Gas · Division 5.1 - Oxidizer
Packaging (49 CFR 173)
Non-bulk §173.304 · Bulk §173.314, 315
Air limit per package
Passenger aircraft: Forbidden · Cargo aircraft: Forbidden
Special provisions
B6, T75, TP5, TP22

Source: 49 CFR 172.101 Hazardous Materials Table — UN2201 (2025-01-01)

UN Number
UN2201
Hazard Class
2.2 (sub-risk 5.1)
Packing Group
Not assigned

Hazard Labels / Marks

  • Division 2.2 - Non-flammable, Non-toxic Gas
  • Division 5.1 - Oxidizer

Source: 49 CFR §172.101 Hazardous Materials Table · 49 CFR §172.101 (2025-01-01)

Reference data transcribed from the published Dangerous Goods List. It is not legal advice and may not capture entry-specific exceptions, special provisions or packing-group ranges. Always verify against the current regulation edition for a specific shipment.

This is the reference entry for UN2201.

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