Print Friendly Page
United Nations/North American Number Datasheet

UN/NA 1754

8 - Corrosive 6.1 - Poison Inhalation Hazard

Emergency Response Guidebook (ERG, 2016)

The Emergency Response Guidebook (ERG) provides general response recommendations for first responders.

UN/NA datasheets display several items from the ERG: material names, response guide PDFs, initial isolation and protective action distances, warnings about toxic-by-inhalation gases that may be produced if the material spills in water, and polymerization hazards.

Material Names

  • Chlorosulfonic acid (with or without sulfur trioxide mixture)
  • Chlorosulphonic acid (with or without sulphur trioxide mixture)
ERG book cover

Response Guide 137

link to a PDF file Substances - Water-Reactive - Corrosive

 

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
Chlorosulfonic acid (with or without sulfur trioxide mixture) (when spilled on land) 100 ft 0.1 mi 0.1 mi 100 ft 0.2 mi 0.2 mi
Chlorosulfonic acid (with or without sulfur trioxide mixture) (when spilled in water) 100 ft 0.1 mi 0.2 mi 200 ft 0.4 mi 1.4 mi
Chlorosulphonic acid (with or without sulphur trioxide mixture) (when spilled on land) 100 ft 0.1 mi 0.1 mi 100 ft 0.2 mi 0.2 mi
Chlorosulphonic acid (with or without sulphur trioxide mixture) (when spilled in water) 100 ft 0.1 mi 0.2 mi 200 ft 0.4 mi 1.4 mi

ERG Table 2: Water-Reactive Materials which Produce Toxic-By-Inhalation Gases

When spilled in water, large amounts of Hydrogen chloride (HCl) may be produced.

Hazmat Table (49 CFR 172.101)

The Hazmat Table in 49 CFR 172.101 "lists and classifies those materials which the Department (of Transportation) has designated as hazardous materials for purposes of transportation".

UN/NA datasheets display several items from the Hazmat Table: proper shipping names, hazard classes and divisions (explosives may also include a compatibility group letter), label codes, and special notes relating to shipping location, shipping name, and whether the material is an inhalation hazard.

Descriptive text for each label code is shown below the table, along with representative vehicle placards.

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 Chlorosulfonic acid (with or without sulfur trioxide) 8 8, 6.1 Inhalation Hazard Zone B

  8 - Corrosive

  6.1 - Poison Inhalation Hazard