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United Nations/North American Number Datasheet

UN/NA 1384

 4.2 - Spontaneously combustible

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

  • Sodium dithionite
  • Sodium hydrosulfite
  • Sodium hydrosulphite
 ERG book cover

Response Guide 135

Substances - Spontaneously Combustible Sustancias - Espontáneamente Combustibles Substances - Spontanément Inflammables

 

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
Sodium dithionite (when spilled in water) 100 ft 0.1 mi 0.3 mi 200 ft 0.3 mi 1.3 mi
Sodium hydrosulfite (when spilled in water) 100 ft 0.1 mi 0.3 mi 200 ft 0.3 mi 1.3 mi
Sodium hydrosulphite (when spilled in water) 100 ft 0.1 mi 0.3 mi 200 ft 0.3 mi 1.3 mi

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

When spilled in water, large amounts of Hydrogen sulfide (H2S) and Sulfur dioxide (SO2) may be produced.

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 Sodium dithionite or Sodium hydrosulfite 4.2 4.2

  4.2 - Spontaneously combustible