HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
Aerosols, flammable, (each not exceeding 1 L capacity)
HMT 15 June 2026- UN / ID
- UN 1950
- Hazard class
- 2.1
- Packing group
- — (multiple — see tabs)
- ERG guide
- ERG 126
- Special provisions
- SP N82
- Source
- 49 CFR §172 (15 June 2026)
Aerosols, flammable, (each not exceeding 1 L capacity)
An aerosol is a suspension of fine solid particles or liquid droplets in air or another gas. Aerosols can be generated from natural or human causes. The scientific term aerosol refers to the mixture of particulates in gas, and not to the particulate matter alone. The liquid or solid particles in an aerosol have diameters typically less than 1 μm Wikipedia
| Emergency Response Guide No. 126 |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard class2.1Flammable gases |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
|
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| 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 | |
|---|---|
| (10B) Other |
(3) Hazard class2.1Flammable gases |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
|
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| 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 | |
|---|---|
| (10B) Other |
(3) Hazard class2.2Non-toxic, non-flammable gases |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(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 | |
|---|---|
| (10B) Other |
(3) Hazard class2.2Non-toxic, non-flammable gases |
(4) Identification number |
(5) Packing Group |
|||||||
(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 | |
|---|---|
| (10B) Other |
(3) Hazard class2.2Non-toxic, non-flammable gases |
(4) Identification number |
(5) Packing Group |
|||||||
(6) Labels |
|||||||||
(7) Special Provisions (§172.102)
|
|||||||||
| 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 | |
|---|---|
| (10B) Other |
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 — | PG — | PG — | PG — | PG — | |
|---|---|---|---|---|---|
| 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 | — | — | — | — | — |
| 6 | 2.1 | 2.1 | 2.2 | 2.2, 6.1 | 2.2, 8 |
| 7 | N82 | N82 | — | — | 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. |