Gallium is a chemical element with symbol Ga and atomic number 31. It is in group 13 of the periodic table, and thus has similarities to the other metals of the group, aluminium, indium, and thallium. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. Elemental gallium is a soft, silvery blue metal at standard temperature and pressure, a brittle solid at low temperatures, and a liquid at temperatures greater than 29.76 °C (85.57 °F) (above room temperature, but below the normal human body temperature of 37.5 °C (99.5 °F), hence, the metal will melt in a person's hands). The melting point of gallium is used as a temperature reference point. Wikipedia

Substance Data

Source: TOXNET (HSDB, 24.10.2018)



Flash Point


Boiling Point


Emergency Response Guide No. 172

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2018/07)

(3) Hazard Class

Corrosive liquids

(4) Identification number Help

UN 2803

(5) Packing Group Help


(6) Labels Help

Corrosive liquids (8)

(7) Special Provisions (§172.102) Help

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.

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

(8A) ExceptionsNone
(8B) Non-bulk162see 49 CFR §173.162
(8C) Bulk240see 49 CFR §173.240

(9) Quantity Limits Help

(9A) Passenger aircraft/rail20 kg
(9B) Cargo aircraft only20 kg

(10) Vessel stowage Help

(10A) Location
(10B) Other

Segregation Chart for Load, Transport, Storage

In this table a statement is contained for each hazard class whether the loading, transport or storage with other hazard classes is allowed, is not permitted or is restricted. The table is based on U.S.-Code 49 CFR §177.848.

red May not be loaded, transported, or stored together in the same transport vehicle or storage facility.
green Load, transport, storage together is not restricted.
yellow Load, transport, storage together is allowed under restrictions.