Hydrogen cyanide

CAS RN: 74-90-8

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
1051 Hydrogen cyanide, stabilized
Hydrogen cyanide, anhydrous, stabilized
200 ft 0.1 mi 0.4 mi 600 ft 0.5 mi 1.1 mi
1613 Hydrogen cyanide, aqueous solution, with not more than 20% Hydrogen cyanide
Hydrocyanic acid, aqueous solution, with not more than 20% Hydrogen cyanide
100 ft 0.1 mi 0.1 mi 300 ft 0.3 mi 0.7 mi
1614 Hydrogen cyanide, stabilized (absorbed) 200 ft 0.1 mi 0.4 mi 500 ft 0.3 mi 0.9 mi
3294 Hydrogen cyanide, solution in alcohol, with not more than 45% Hydrogen cyanide 100 ft 0.1 mi 0.2 mi 600 ft 0.3 mi 1.2 mi


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Find more information on this substance at: PubChem, PubMed