UN/NA 1929 |
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The ERG recommendations are developed for use during the
initial phase of transportation incidents;
they are not intended for spills at facilities.
Material Names
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Name of Material | Small Spills (from a small package or small leak) |
Large Spills (from a large package or many small packages) |
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First Isolate in all Directions |
Then Protect Downwind |
First Isolate in all Directions |
Then Protect Downwind | |||
Day | Night | Day | Night | |||
Potassium dithionite (when spilled in water) | 100 ft | 0.1 mi | 0.2 mi | 200 ft | 0.3 mi | 1.2 mi |
Potassium hydrosulfite (when spilled in water) | 100 ft | 0.1 mi | 0.2 mi | 200 ft | 0.3 mi | 1.2 mi |
Potassium hydrosulphite (when spilled in water) | 100 ft | 0.1 mi | 0.2 mi | 200 ft | 0.3 mi | 1.2 mi |
When spilled in water, large amounts of Hydrogen sulfide (H2S) and Sulfur dioxide (SO2) may be produced.
UN/NA | Proper Shipping Name | Hazard Class | Labels | Notes* |
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* 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. |
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UN | Potassium dithionite or Potassium hydrosulfite | 4.2 | 4.2 |
4.2 - Spontaneously combustible