HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
1,1-Difluoroethane or Refrigerant gas R 152a
HMT 15 June 2026- UN / ID
- UN 1030
- Hazard class
- 2.1
- Packing group
- —
- ERG guide
- ERG 115
- Special provisions
- SP T50
- Source
- 49 CFR §172 (15 June 2026)
1,1-Difluoroethane or Refrigerant gas R 152a
1,1-Difluoroethane, or DFE, is a hydrofluorocarbon with the chemical formula C2H4F2 or CH3CHF2. This colorless gas is primarily used as a propellant and foam blowing agent as well as a component in a refrigerant, where it is often listed as R-152a (refrigerant-152a) or HFC-152a (hydrofluorocarbon-152a). It is predominantly used as a propellant for aerosol sprays and in gas duster products. As an alternative to chlorofluorocarbons, it has a global warming potential of 120-140, lower than other hydrofluorocarbons, and a shorter atmospheric lifetime (1.4 years) Wikipedia
Substance Data
Source: PubChem (HSDB, 22.10.2026)CAS-Number75-37-6 |
Flash Point-50 ° C | Boiling Point-24.05 ° C |
| Emergency Response Guide No. 115 |
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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| T50 |
|---|
(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | 306 | see 49 CFR §173.306 |
|---|---|---|
| (8B) Non-bulk | 304 | see 49 CFR §173.304 |
| (8C) Bulk | 314, 315 | see 49 CFR §173.314, 315 |
(9) Quantity Limits 
| (9A) Passenger aircraft/rail | Forbidden |
|---|---|
| (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.
| 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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1.6 ![]() | ||||||||||||||||||
2.1 ![]() | ||||||||||||||||||
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2.3A ![]() | ||||||||||||||||||
2.3B ![]() | ||||||||||||||||||
3 ![]() | ||||||||||||||||||
4.1 ![]() | ||||||||||||||||||
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5.1 ![]() | ||||||||||||||||||
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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. |