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UN identification number

UN1044: Fire extinguishers

As listed: Fire extinguishers containing compressed or liquefied gas

UN1044 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 2.2.

ID numberUN1044
Hazard class2.2
Packing groupnot assigned
Label codes2.2

All §172.101 entries for UN1044

Proper shipping nameClassPGLabels
Fire extinguishers containing compressed or liquefied gas2.2—2.2

Open any entry for packaging sections, special provisions, air limits and vessel stowage.

What it means

2.2
Class 2.2 — Non-flammable, non-poisonous gas. Compressed gases that aren't flammable or toxic but can still be dangerous under pressure — for example nitrogen and compressed air.

Label codes (column 6): 2.2 → Non-flammable gas label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN1044, Fire extinguishers, 2.2

Proper shipping name shown without the table's italic descriptive text. Order per §172.202: ID number, proper shipping name, hazard class, packing group. Example only — add technical names, “RQ”, quantities and other elements your shipment requires.

What to check next

  1. Match the name. Compare your SDS Section 14 to the proper shipping names above and pick the row with your packing group.
  2. Read the special provisions on the entry page (§172.102) — they can add limits or exceptions.
  3. Check packaging — the entry page lists the Part 173 sections for exceptions, non-bulk and bulk.
  4. Labels & placards. Placarding depends on class and quantity — see Table 1 vs Table 2.
  5. Emergency response. Find the response guide for UN1044 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN1044

What is UN1044?

UN1044 is the identification number for Fire extinguishers in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN1044?

UN1044 is listed under hazard class 2.2 (non-flammable, non-poisonous gas).

What packing group is UN1044?

Packing group for UN1044: not assigned. Where several rows exist, the packing group that fits your material decides which row applies.

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Source: Hazardous Materials Table (49 CFR §172.101), eCFR.gov — current as of Oct 23, 2026. View the official table. Reference only — verify current requirements before shipping.