HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
Carbon dioxide
HMT 15 June 2026- UN / ID
- UN 1013
- Hazard class
- 2.2
- Packing group
- —
- ERG guide
- ERG 120
- Special provisions
- —
- Source
- 49 CFR §172 (15 June 2026)
Carbon dioxide
Carbon dioxide is a chemical compound with the chemical formula CO2. It is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in a gas state at room temperature and at normally-encountered concentrations it is odorless. As the source of carbon in the carbon cycle, atmospheric CO2 is the primary carbon source for life on Earth Wikipedia
Substance Data
Source: PubChem (HSDB, 21.10.2026)CAS-Number124-38-9 |
Flash Point— | Boiling Point-78.464 ° C |
| Emergency Response Guide No. 120 |
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 | see 49 CFR §173.306 |
|---|---|---|
| (8B) Non-bulk | 302, 304 | see 49 CFR §173.302, 304 |
| (8C) Bulk | 302, 314, 315 | see 49 CFR §173.302, 314, 315 |
(9) Quantity Limits 
| (9A) Passenger aircraft/rail | 75 kg |
|---|---|
| (9B) Cargo aircraft only | 150 kg |
(10) Vessel stowage 
| (10A) Location | |
|---|---|
| (10B) Other | — |
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.
Full segregation table for class 2.2 · Browse UN entries for this class
| 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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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. |