HazMat Tool — substance information

Ethyl methyl ether

HMT May 2026

UN / ID: UN 1039
Hazard class: 2.1
Packing group: —
ERG guide: ERG 115
Special provisions: —
Source: 49 CFR §172 (2026/05)

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Ethyl methyl ether

Substance Data

Source: PubChem (HSDB, 04.12.2019)

CAS-Number

540-67-0

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 115

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

2.1
Flammable gases

(4) Identification number

UN 1039

(5) Packing Group

n/a

(6) Labels

Flammable gases (2.1)

Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102)

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	201	see 49 CFR §173.201
(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

B

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 3153	Perfluoro(methyl vinyl ether)	2.1
	Methylamine perchlorate (dry)	Forbidden
	Methylene glycol dinitrate	Forbidden
UN 2350	Butyl methyl ether	3
UN 2354	Chloromethyl ethyl ether	3
UN 1033	Dimethyl ether	2.1
UN 1239	Methyl chloromethyl ether	6.1
UN 2612	Methyl propyl ether	3
UN 2398	Methyl tert-butyl ether	3
UN 2379	1, 3-Dimethylbutylamine	3
	a-Methylglycerol trinitrate	Forbidden
UN 2621	Acetyl methyl carbinol	3
UN 2745	Chloromethyl chloroformate	6.1
UN 1161	Dimethyl carbonate	3
UN 2381	Dimethyl disulfide	3