United Nations/North American Number Datasheet

UN/NA 2196

2.3 - Poisonous gas 8 - Corrosive

Emergency Response Guidebook (ERG, 2016)

Material Names

  • Tungsten hexafluoride
ERG book cover

Response Guide 125

Gases - Corrosive Gases - Corrosivos Gaz - Corrosifs


ERG Table 1: Initial Isolation and Protective Action Distances

Name of Material Small Spills
(from a small package or small leak)
Large Spills
(from a large package or many small packages)
in all Directions
Then Protect Downwind First
in all Directions
Then Protect Downwind
Day Night Day Night
Tungsten hexafluoride 100 ft 0.1 mi 0.5 mi 500 ft 0.6 mi 1.8 mi

The ERG doesn't predict that large amounts of toxic-by-inhalation gases will be produced if this material is spilled in water.

Hazmat Table (49 CFR 172.101)

UN/NA Proper Shipping Name Hazard Class Labels Notes*

* There are three notes: (1) whether the displayed information is for domestic (U.S.) or international shipping (if neither is specifically indicated, it applies to both), (2) whether the proper shipping name must include one or more technical names of the hazardous material in parentheses, and (3) whether the hazardous material is an inhalation hazard.
UN Tungsten hexafluoride 2.3 2.3, 8 Inhalation Hazard Zone B

  2.3 - Poisonous gas

  8 - Corrosive