Ammonia

CAS RN: 7664-41-7
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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
1005 Anhydrous ammonia
Ammonia, anhydrous
100 ft 0.1 mi 0.1 mi See Table 3 Below
3318 Ammonia solution, with more than 50% Ammonia 100 ft 0.1 mi 0.1 mi 500 ft 0.5 mi 1.3 mi

UN1005 Ammonia, anhydrous: Large Spills
UN1005 Anhydrous ammonia: Large Spills

Rail tank car
Highway tank truck or trailer
Agricultural nurse tank
Multiple small cylinders
Transport container Rail tank car
First ISOLATE in all Directions 1,000 ft
Then PROTECT downwind
DAY
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

1.2 mi

0.9 mi

0.6 mi
NIGHT
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

2.8 mi

1.5 mi

0.9 mi
Transport container Highway tank truck or trailer
First ISOLATE in all Directions 500 ft
Then PROTECT downwind
DAY
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

0.6 mi

0.3 mi

0.3 mi
NIGHT
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

1.3 mi

0.5 mi

0.4 mi
Transport container Agricultural nurse tank
First ISOLATE in all Directions 200 ft
Then PROTECT downwind
DAY
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

0.3 mi

0.2 mi

0.2 mi
NIGHT
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

0.9 mi

0.2 mi

0.2 mi
Transport container Multiple small cylinders
First ISOLATE in all Directions 100 ft
Then PROTECT downwind
DAY
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

0.2 mi

0.1 mi

0.1 mi
NIGHT
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

0.5 mi

0.2 mi

0.1 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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Wind Direction
Select the direction of the wind at your location.
Wind Rose Wind Arrow
 
 
 
     
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