HazMat Tool — substance information

Compressed gas, oxidizing, n.o.s.

HMT 15 June 2026

UN / ID: UN 3156
Hazard class: 2.2
Packing group: —
ERG guide: ERG 122
Special provisions: SP A14
Source: 49 CFR §172 (15 June 2026)

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Compressed gas, oxidizing, n.o.s.

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

This entry is signed with "G". The letter "G" identifies proper shipping names for which one or more technical names of the hazardous material must be entered in parentheses, in association with the basic description. (See §172.203(k)).

(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.

A14	This material is not authorized to be transported as a limited quantity or consumer commodity in accordance with § 173.306 of this subchapter when transported aboard an aircraft. Browse special provision A14

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	302	see 49 CFR §173.302
(8C) Bulk	314, 315	see 49 CFR §173.314, 315

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location	D 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	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 3388	Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50	6.1
UN 3387	Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50	6.1
UN 2037	Receptacles, small, containing gas or gas cartridges (oxidizing), without release device, not refillable and not exceeding 1 L capacity	2.2
UN 0341	Nitrocellulose, unmodified or plasticized with less than 18 percent plasticizing substance, by mass	1.1D
UN 0343	Nitrocellulose, plasticized with not less than 18 percent plasticizing substance, by mass	1.3C
UN 3518	Adsorbed gas, toxic, oxidizing, corrosive, n.o.s. Inhalation hazard zone A	2.3
UN 3518	Adsorbed gas, toxic, oxidizing, corrosive, n.o.s. Inhalation hazard zone B	2.3
UN 3518	Adsorbed gas, toxic, oxidizing, corrosive, n.o.s. Inhalation hazard zone C	2.3
UN 3518	Adsorbed gas, toxic, oxidizing, corrosive, n.o.s. Inhalation hazard zone D	2.3
UN 3306	Compressed gas, toxic, oxdizing, corrosive, n.o.s. Inhalation Hazard Zone A	2.3
UN 3310	Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone A	2.3
UN 3310	Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone B	2.3
UN 3310	Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone C	2.3
UN 3310	Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone D	2.3
UN 3515	Adsorbed gas, toxic, oxidizing, n.o.s. Inhalation hazard zone A	2.3