HazMat Tool — substance information

Alkali metal amalgam, solid

HMT May 2026
UN / ID
UN 3401
Hazard class
4.3
Packing group
I
ERG guide
ERG 138
Special provisions
SP IB4, SP IP1, SP N40, SP T9, SP TP7, SP TP33, SP W31
Source
49 CFR §172 (2026/05)

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Alkali metal amalgam, solid

Emergency Response Guide No. 138

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

4.3
Dangerous when wet materials

(4) Identification number Help

UN 3401

(5) Packing Group Help

I

(6) Labels Help

Dangerous when wet materials (4.3) 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.
IB4
IP1
N40
T9
TP7
TP33
W31

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

(8A) ExceptionsNone
(8B) Non-bulk211see 49 CFR §173.211
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only15 kg

(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.

Similar substances

UN / IDProper shipping nameHazard class
UN 3402Alkaline earth metal amalgams, solid4.3
UN 1392Alkaline earth metal amalgams, liquid4.3
UN 1389Alkali metal amalgam, liquid4.3