HazMat Tool — substance information

Fire extinguishers containing compressed or liquefied gas

HMT 15 June 2026

UN / ID: UN 1044
Hazard class: 2.2
Packing group: —
ERG guide: ERG 126
Special provisions: SP 110
Source: 49 CFR §172 (15 June 2026)

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Fire extinguishers containing compressed or liquefied gas

Emergency Response Guide No. 126

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

2.2
Non-toxic, non-flammable gases

(7) Special Provisions (§172.102)

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.

110	Fire extinguishers transported under UN1044 and oxygen cylinders transported for emergency use under UN1072 may include installed actuating cartridges (cartridges, power device of Division 1.4C or 1.4S), without changing the classification of Division 2.2, provided the aggregate quantity of deflagrating (propellant) explosives does not exceed 3.2 grams per cylinder. Oxygen cylinders with installed actuating cartridges as prepared for transportation must have an effective means of preventing inadvertent activation. Browse special provision 110

(8) Packing Authorizations (§173.***)

(8A) Exceptions	309	see 49 CFR §173.309
(8B) Non-bulk	309	see 49 CFR §173.309
(8C) Bulk	None

(9) Quantity Limits

(9A) Passenger aircraft/rail	75 kg
(9B) Cargo aircraft only	150 kg

(10) Vessel stowage

(10A) Location	A Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel. Source: 49 CFR §172.101(k)
(10B) Other	n/a

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

Hazard class	8	7	6.1	5.2	5.1	4.3	4.2	4.1	3	2.3B	2.3A	2.2	2.1	1.6	1.5	1.4	1.3	1.1/1.2
1.1/1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.3A
2.3B
3
4.1
4.2
4.3
5.1
5.2
6.1
7
8

	Must not be loaded, transported, or stored together in the same vehicle or facility.
	May be loaded, transported, or stored together.
	May be loaded, transported, or stored together only with restrictions.

Similar substances

UN / ID	Proper shipping name	Hazard class
	Cartridges, actuating, for aircraft ejector seat catapult, fire extinguisher, canopy removal or apparatus, see Cartridges, power device
UN 1774	Fire extinguisher charges, corrosive liquid	8
	Charges, expelling, explosive, for fire extinguishers, see Cartridges, power device

Fire extinguishers containing compressed or liquefied gas

Fire extinguishers containing compressed or liquefied gas

Hazardous Materials Table

(3) Hazard Class

(4) Identification number

(5) Packing Group

(6) Labels

(7) Special Provisions (§172.102)

(8) Packing Authorizations (§173.***)

(9) Quantity Limits

(10) Vessel stowage

Segregation chart for load, transport, and storage

Similar substances