HazMat Tool — substance information

Tetramethylsilane

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 2749
Hazard class
3
Packing group
I
ERG guide
ERG 130
Special provisions
SP A7, SP T14, SP TP2
Source
49 CFR §172 (15 June 2026)

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Tetramethylsilane


Tetramethylsilane (abbreviated as TMS) is the organosilicon compound with the formula Si(CH3)4. It is a colorless liquid. It is the simplest tetraorganosilane. Like all silanes, the TMS framework is tetrahedral Wikipedia

Emergency Response Guide No. 130

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

3
Flammable liquids

(4) Identification number Help

UN 2749

(5) Packing Group Help

I

(6) Labels Help

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.
A7
T14
TP2

(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 only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other n/a

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.