HazMat Tool — substance information

Air, compressed

HMT 15 June 2026

UN / ID: UN 1002
Hazard class: 2.2
Packing group: —
ERG guide: ERG 122
Special provisions: SP 78
Source: 49 CFR §172 (15 June 2026)

Spot an error in this entry?

On this page

Air, compressed

Emergency Response Guide No. 122

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.

78	Mixtures of nitrogen and oxygen containing not less than 19.5% and not more than 23.5% oxygen by volume may be transported under this entry when no other oxidizing gases are present. A Division 5.1 subsidiary hazard label is not required for any concentrations within this limit. Compressed air containing greater than 23.5% oxygen by volume must be shipped using the description “Compressed gas, oxidizing, n.o.s., UN3156.” Browse special provision 78

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306, 307	see 49 CFR §173.306, 307
(8B) Non-bulk	302	see 49 CFR §173.302
(8C) Bulk	302	see 49 CFR §173.302

(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
UN 3165	Aircraft hydraulic power unit fuel tank (containing a mixture of anhydrous hydrazine and monomethyl hydrazine) (M86 fuel)	3
UN 1058	Liquefied gases, non-flammable charged with nitrogen, carbon dioxide or air	2.2
	Air bag inflators, or Air bag modules, or Seat-belt pretensioners, see Safety devices, electrically initiated or Safety devices, pyrotechnic
	Cartridges, actuating, for aircraft ejector seat catapult, fire extinguisher, canopy removal or apparatus, see Cartridges, power device
UN 1003	Air, refrigerated liquid, (cryogenic liquid) non-pressurized	2.2
UN 1003	Air, refrigerated liquid, (cryogenic liquid)	2.2

Air, compressed

Air, compressed

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