HazMat Tool — substance information

Aerosols, flammable, (each not exceeding 1 L capacity)

HMT May 2026

UN / ID: UN 1950
Hazard class: 2.1
Packing group: n/a (multiple — see tabs)
ERG guide: ERG 126
Special provisions: SP N82
Source: 49 CFR §172 (2026/05)

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Aerosols, flammable, (each not exceeding 1 L capacity)

Emergency Response Guide No. 126

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

Packing group
Packing group
Packing group

(3) Hazard Class

2.1
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.

N82	See §173.115 for classification criteria for flammable aerosols. Browse special provision N82

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	None
(8C) Bulk	None

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

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

25	see 49 CFR §176.84
87	see 49 CFR §176.84
126	see 49 CFR §176.84
157	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard Class

2.1
Flammable gases

(4) Identification number

UN 1950

(5) Packing Group

n/a

Comparison View of PG

(6) Labels

Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102)

N82	See §173.115 for classification criteria for flammable aerosols. Browse special provision N82

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	304	see 49 CFR §173.304
(8C) Bulk	None

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

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

25	see 49 CFR §176.84
87	see 49 CFR §176.84
126	see 49 CFR §176.84
157	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard Class

2.2
Non-toxic, non-flammable gases

(4) Identification number

UN 1950

(5) Packing Group

n/a

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	None
(8C) Bulk	None

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

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

25	see 49 CFR §176.84
87	see 49 CFR §176.84
126	see 49 CFR §176.84
157	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard Class

2.2
Non-toxic, non-flammable gases

(4) Identification number

UN 1950

(5) Packing Group

n/a

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	None
(8C) Bulk	None

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

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

25	see 49 CFR §176.84
87	see 49 CFR §176.84
126	see 49 CFR §176.84
157	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard Class

2.2
Non-toxic, non-flammable gases

(4) Identification number

UN 1950

(5) Packing Group

n/a

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

A34	Aerosols containing a corrosive liquid in Packing Group II charged with a gas are not permitted for transportation by aircraft. Browse special provision A34

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	None
(8C) Bulk	None

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

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

25	see 49 CFR §176.84
87	see 49 CFR §176.84
126	see 49 CFR §176.84
157	see 49 CFR §176.84

Source: 49 CFR §176.84

Packing group comparison

Multiple packing groups apply to this entry. See assignment criteria in 49 CFR §173 Subpart D. Details are in the tabs above; differences are highlighted.

	PG n/a	PG n/a	PG n/a	PG n/a	PG n/a
1
2	Aerosols, flammable, (each not exceeding 1 L capacity)	Aerosols, flammable, n.o.s. (engine starting fluid) (each not exceeding 1 L capacity)	Aerosols, non-flammable, (each not exceeding 1 L capacity)	Aerosols, poison, Packing Group III (each not exceeding 1 L capacity)	Aerosols, corrosive, Packing Group II or III, (each not exceeding 1 L capacity)
3	2.1	2.1	2.2	2.2	2.2
4	UN 1950	UN 1950	UN 1950	UN 1950	UN 1950
5	n/a	n/a	n/a	n/a	n/a
6	2.1	2.1	2.2	2.2, 6.1	2.2, 8
7	N82	N82	n/a	n/a	A34
8A	306	306	306	306	306
8B	None	304	None	None	None
8C	None	None	None	None	None
9A	75 kg	Forbidden	75 kg	Forbidden	75 kg
9B	150 kg	150 kg	150 kg	Forbidden	150 kg
10A	A	A	A	A	A
10B	25, 87, 126, 157	25, 87, 126, 157	25, 87, 126, 157	25, 87, 126, 157	25, 87, 126, 157

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 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone A	2.3
UN 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone B	2.3
UN 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone C	2.3
UN 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone D	2.3
UN 3308	Liquefied gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone C	2.3
UN 3308	Liquefied gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone D	2.3
UN 3206	Alkali metal alcoholates, self-heating, corrosive, n.o.s.	4.2
UN 3547	Articles containing corrosive substance, n.o.s.	8
UN 3505	Chemical under pressure, flammable, corrosive, n.o.s	2.1
UN 3264	Corrosive liquid, acidic, inorganic, n.o.s	8
UN 3265	Corrosive liquid, acidic, organic, n.o.s	8
UN 3266	Corrosive liquid, basic, inorganic, n.o.s	8
UN 3267	Corrosive liquid, basic, organic, n.o.s	8
UN 3260	Corrosive solid, acidic, inorganic, n.o.s	8
UN 3261	Corrosive solid, acidic, organic, n.o.s	8