HazMat Tool — substance information Reference only — not a shipping paper, placard mandate, or CVI record.

Air, refrigerated liquid, (cryogenic liquid)

HMT 15 June 2026

UN / ID: UN 1003
Hazard class: 2.2
Packing group: — (multiple — see tabs)
ERG guide: ERG 122
Special provisions: SP T75, SP TP5, SP TP22
Source: 49 CFR §172 (15 June 2026)

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Air, refrigerated liquid, (cryogenic liquid)

The atmosphere of Earth consists of a layer of mixed gas (commonly referred to as air) that is retained by gravity, surrounding the Earth's surface. It contains variable quantities of suspended aerosols and particulates that create weather features such as clouds and hazes. The atmosphere serves as a protective buffer between the Earth's surface and outer space. It shields the surface from most meteoroids and ultraviolet solar radiation, reduces diurnal temperature variation – the temperature extremes between day and night, and keeps it warm through heat retention via the greenhouse effect Wikipedia

Emergency Response Guide No. 122

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

Packing group
Packing group

(3) Hazard class

2.2
Non-toxic, non-flammable gases

(4) Identification number

UN 1003

(5) Packing Group

—

Comparison View of PG

(6) Labels

(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.

T75	When portable tank instruction T75 is referenced in Column (7) of the § 172.101 Table, the applicable refrigerated liquefied gases are authorized to be transported in portable tanks in accordance with the requirements of § 178.277 of this subchapter. Browse special provision T75
TP5	For a portable tank used for the transport of flammable refrigerated liquefied gases or refrigerated liquefied oxygen, the maximum rate at which the portable tank may be filled must not exceed the liquid flow capacity of the primary pressure relief system rated at a pressure not exceeding 120 percent of the portable tank's design pressure. For portable tanks used for the transport of refrigerated liquefied helium and refrigerated liquefied atmospheric gas (except oxygen), the maximum rate at which the tank is filled must not exceed the liquid flow capacity of the pressure relief device rated at 130 percent of the portable tank's design pressure. Except for a portable tank containing refrigerated liquefied helium, a portable tank shall have an outage of at least two percent below the inlet of the pressure relief device or pressure control valve, under conditions of incipient opening, with the portable tank in a level attitude. No outage is required for helium. Browse special provision TP5
TP22	Lubricants for portable tank fittings (for example, gaskets, shut-off valves, flanges) must be oxygen compatible. Browse special provision TP22

(8) Packing Authorizations (§173.***)

(8A) Exceptions	320	see 49 CFR §173.320
(8B) Non-bulk	316	see 49 CFR §173.316
(8C) Bulk	318, 319	see 49 CFR §173.318, 319

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	Forbidden

(10) Vessel stowage

(10A) Location

Stowage category “D” means the material must be stowed “on deck only” on a cargo vessel or on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers or one passenger per each 3 m of overall vessel length, but the material is prohibited on a passenger vessel in which the limiting number of passengers is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

51	see 49 CFR §176.84

Source: 49 CFR §176.84