HazMat Tool — substance information Reference only — not a shipping paper, placard mandate, or CVI record.

Methyl chloromethyl ether

HMT 15 June 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 1239
Hazard class
6.1
Packing group
I
ERG guide
ERG 131
Special provisions
SP 1, SP B9, SP B14, SP B30, SP T22, SP TP2, SP TP13, SP TP38, more…
Source
49 CFR §172 (15 June 2026)

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Methyl chloromethyl ether


Chloromethyl methyl ether (CMME) is a compound with formula CH3OCH2Cl. A colorless liquid, it is a chloroalkyl ether. It is used as an alkylating agent. In organic synthesis, it is used for introducing the methoxymethyl ether (MOM) protecting group, and is thus often called MOM-Cl or MOM chloride Wikipedia

Emergency Response Guide No. 131

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard class

6.1
Poisonous Material

(4) Identification number Help

UN 1239

(5) Packing Group Help

I

(6) Labels Help

Poisonous liquids PG I Zone A (6.1) Flammable liquids (3)

(7) Special Provisions (§172.102) Help

×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.
1
B9
B14
B30
T22
TP2
TP13
TP38
TP44

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk226see 49 CFR §173.226
(8C) Bulk244see 49 CFR §173.244

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft onlyForbidden

(10) Vessel stowage Help

(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.

Prohibited Must not be loaded, transported, or stored together in the same vehicle or facility.
Permitted May be loaded, transported, or stored together.
Restricted May be loaded, transported, or stored together only with restrictions.