Methyl Isocyanate

CAS RN: 624-83-9

Protective Distance

IF THERE IS A FIRE, or IF A FIRE IS INVOLVED, go directly to the ERG guide page and use the evacuation information shown under PUBLIC SAFETY.

Initial Isolation and Protective Action Distances
ID MATERIAL Small Spills
(From a small package or small leak from a large package)
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
2480 Methyl isocyanate 500 ft 1.1 mi 3.1 mi 3,000 ft 7+ mi 7+ mi


To plot a protective action distance, first specify a location and wind direction below. Once a distance is plotted, you can drag the spill or right click the map to move the spill to a new location.
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  • If a fire is involved
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Find more information on this substance at: PubChem, PubMed