HazMat Tool — substance information

Methyldichlorosilane

HMT May 2026
UN / ID
UN 1242
Hazard class
4.3
Packing group
I
ERG guide
ERG 139
Special provisions
SP A2, SP A7, SP B6, SP B77, SP N34, SP T14, SP TP2, SP TP7, more…
Source
49 CFR §172 (2026/05)

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Methyldichlorosilane

Substance Data

Source: PubChem (HSDB, 24.11.2019)

CAS-Number

75-54-7

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 139

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

4.3
Dangerous when wet materials

(4) Identification number Help

UN 1242

(5) Packing Group Help

I

(6) Labels Help

Dangerous when wet materials (4.3) Corrosive liquids (8) Flammable liquids (3) Cargo Aircraft Only (Cargo Aircraft Only)

(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.
A2
A7
B6
B77
N34
T14
TP2
TP7
TP13
W31

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

(8A) ExceptionsNone
(8B) Non-bulk201see 49 CFR §173.201
(8C) Bulk243see 49 CFR §173.243

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only1 L

(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.