HazMat Tool — substance information

Ethylene oxide and carbon dioxide mixtures with more than 9 percent but not more than 87 percent ethylene oxide

HMT May 2026

UN / ID: UN 1041
Hazard class: 2.1
Packing group: —
ERG guide: ERG 115
Special provisions: SP T50
Source: 49 CFR §172 (2026/05)

Spot an error in this entry?

On this page

Ethylene oxide and carbon dioxide mixtures with more than 9 percent but not more than 87 percent ethylene oxide

Emergency Response Guide No. 115

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

2.1
Flammable gases

(7) Special Provisions (§172.102)

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.

T50	When portable tank instruction T50 is indicated in Column (7) of the §172.101 Hazardous Materials Table, the applicable liquefied compressed gas and chemical under pressure descriptions are authorized to be transported in portable tanks in accordance with the requirements of §173.313. Browse special provision 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	25 kg

(10) Vessel stowage

(10A) Location

Stowage category “B” means

(i) The material may be stowed “on deck” or “under deck” on a cargo vessel and 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; and
(ii) “On deck only” on passenger vessels in which the number of passengers specified in paragraph (k)(2)(i) of this section 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 0072	Cyclotrimethylenetrinitramine, wetted or Cyclonite, wetted or Hexogen, wetted or RDX, wetted with not less than 15 percent water by mass	1.1D
UN 1040	Ethylene oxide or Ethylene oxide with nitrogen up to a total pressure of 1 MPa (10 bar) at 50 degrees C	2.3
UN 3138	Ethylene, acetylene and propylene in mixture, refrigerated liquid with at least 71.5 percent ethylene with not more than 22.5 percent acetylene and not more than 6 percent propylene	2.1
UN 0226	Cyclotetramethylenetetranitramine, wetted or HMX, wetted or Octogen, wetted with not less than 15 percent water, by mass	1.1D
UN 0483	Cyclotrimethylenetrinitramine, desensitized or Cyclonite, desensitized or Hexogen, desensitized or RDX, desensitized	1.1D
UN 0075	Diethyleneglycol dinitrate, desensitized with not less than 25 percent non-volatile water-insoluble phlegmatizer, by mass	1.1D
UN 0484	Cyclotetramethylenetetranitramine, desensitized or Octogen, desensitized or HMX, desensitized	1.1D
UN 1082	Trifluorochloroethylene, stabilized or Refrigerant gas R 1113	2.3
UN 1959	1,1-Difluoroethylene or Refrigerant gas R 1132a	2.1
	Cyclotetramethylene tetranitramine (dry or unphlegmatized) (HMX)	Forbidden
UN 3297	Ethylene oxide and chlorotetrafluoroethane mixture with not more than 8.8 percent ethylene oxide	2.2
UN 3070	Ethylene oxide and dichlorodifluoromethane mixture, with not more than 12.5 percent ethylene oxide	2.2
UN 3298	Ethylene oxide and pentafluoroethane mixture with not more than 7.9 percent ethylene oxide	2.2
UN 2983	Ethylene oxide and propylene oxide mixtures, with not more than 30 percent ethylene oxide	3
UN 3299	Ethylene oxide and tetrafluoroethane mixture with not more than 5.6 percent ethylene oxide	2.2