HazMat Tool — substance information

1,1-Difluoroethylene or Refrigerant gas R 1132a

HMT 15 June 2026

UN / ID: UN 1959
Hazard class: 2.1
Packing group: —
ERG guide: ERG 116P
Special provisions: —
Source: 49 CFR §172 (15 June 2026)

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1,1-Difluoroethylene or Refrigerant gas R 1132a

Substance Data

Source: PubChem (HSDB, 06.12.2019)

CAS-Number

75-38-7

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 116P

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

2.1
Flammable gases

(7) Special Provisions (§172.102)

(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

Stowage category “E” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers, or one passenger per each 3 m of overall vessel length, but is prohibited from carriage on a passenger vessel in which the limiting number of passengers is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

40	see 49 CFR §176.84

Source: 49 CFR §176.84

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 1973	Chlorodifluoromethane and chloropentafluoroethane mixture or Refrigerant gas R 502 with fixed boiling point, with approximately 49 percent chlorodifluoromethane	2.2
UN 2602	Dichlorodifluoromethane and difluoroethane azeotropic mixture or Refrigerant gas R 500 with approximately 74 percent dichlorodifluoromethane	2.2
UN 3297	Ethylene oxide and chlorotetrafluoroethane mixture with not more than 8.8 percent ethylene oxide	2.2
UN 3298	Ethylene oxide and pentafluoroethane mixture with not more than 7.9 percent ethylene oxide	2.2
UN 3299	Ethylene oxide and tetrafluoroethane mixture with not more than 5.6 percent ethylene oxide	2.2
UN 2035	1,1,1-Trifluoroethane or Refrigerant gas, R 143a	2.1
UN 1958	1,2-Dichloro-1,1,2,2- tetrafluoroethane or Refrigerant gas R 114	2.2
UN 1081	Tetrafluoroethylene, stabilized	2.1
UN 3159	1,1,1,2-Tetrafluoroethane or Refrigerant gas R 134a	2.2
UN 1030	1,1-Difluoroethane or Refrigerant gas R 152a	2.1
UN 2517	1-Chloro-1,1-difluoroethane or Refrigerant gas R 142b	2.1
UN 1021	1-Chloro-1,2,2,2-tetrafluoroethaneor Refrigerant gas R 124	2.2
UN 1983	1-Chloro-2,2,2-trifluoroethane or Refrigerant gas R 133a	2.2
UN 1020	Chloropentafluoroethane or Refrigerant gas R 115	2.2
UN 2193	Hexafluoroethane, or Refrigerant gas R 116	2.2