Phosphine (IUPAC name: phosphane) is the compound with the chemical formula PH3. It is a colorless, flammable, toxic gas and pnictogen hydride. Pure phosphine is odorless, but technical grade samples have a highly unpleasant odor like garlic or rotting fish, due to the presence of substituted phosphine and diphosphane (P2H4). With traces of P2H4 present, PH3 is spontaneously flammable in air, burning with a luminous flame. Wikipedia

Emergency Response Guide No. 119

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2015/12)

(3) Hazard Class

Poisonous gas

(4) Identification number Help

UN 2199

(5) Packing Group Help


(6) Labels Help

Poisonous gas (2.3) Flammable gases (2.1)

(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-bulk192see 49 CFR §173.192
(8C) Bulk245see 49 CFR §173.245

(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, 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.

Substances with similar name

UN-NumberNameHazard Class
Cyclooctadiene phosphines, see 9-Phosphabicyclononanes
UN 2199Phosphine2.3
UN 3525Phosphine, adsorbed2.3
UN 2501Tris-(1-aziridinyl)phosphine oxide, solution6.1