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United Nations/North American Number Datasheet

UN/NA 1829

 8 - Corrosive 6.1 - Poison Inhalation Hazard

Emergency Response Guidebook (ERG, 2024)

A caution icon. The ERG recommendations are developed for use during the initial phase of transportation incidents; they are not intended for spills at facilities.

Material Names

  • Sulfur trioxide, stabilized
  • Sulphur trioxide, stabilized
 ERG book cover

Response Guide 137

Substances - Water-Reactive - Corrosive Sustancias - Reactivas con el Agua - Corrosivas Substances - Réagissant à l'Eau - Corrosives

 

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)
First
Isolate
in all Directions		 Then Protect Downwind First
Isolate
in all Directions		 Then Protect Downwind
Day Night Day Night
Sulfur trioxide, stabilized 200 ft 0.2 mi 0.6 mi 1000 ft 1.8 mi 4.0 mi
Sulphur trioxide, stabilized 200 ft 0.2 mi 0.6 mi 1000 ft 1.8 mi 4.0 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 Sulfur trioxide, stabilized 8 8, 6.1 Inhalation Hazard Zone B

  8 - Corrosive

  6.1 - Poison Inhalation Hazard