HazMat Tool — substance information
Nitrogen, compressed
HMT 15 June 2026- UN / ID
- UN 1066
- Hazard class
- 2.2
- Packing group
- —
- ERG guide
- ERG 121
- Special provisions
- —
- Source
- 49 CFR §172 (15 June 2026)
Nitrogen, compressed
Nitrogen is a chemical element; it has symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh in total abundance in the Milky Way and the Solar System. At standard temperature and pressure, two atoms of the element bond to form N2, a colourless and odourless diatomic gas Wikipedia
Substance Data
Source: PubChem (HSDB, 16.12.2019)CAS-Number7727-37-9 |
Flash Pointn/a | Boiling Pointn/a |
| Emergency Response Guide No. 121 |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(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)
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(8) Packing Authorizations (§173.***)
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| (8A) Exceptions | 306, 307 | see 49 CFR §173.306, 307 |
|---|---|---|
| (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 | |
|---|---|
| (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![]() |
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1.5 ![]() | ||||||||||||||||||
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2.1 ![]() | ||||||||||||||||||
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2.3A ![]() | ||||||||||||||||||
2.3B ![]() | ||||||||||||||||||
3 ![]() | ||||||||||||||||||
4.1 ![]() | ||||||||||||||||||
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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. |