Chlorine


ERG Guide Book

GUIDE 124
Gases - Toxic and/or Corrosive - Oxidizing
POTENTIAL HAZARDS
HEALTH
· TOXIC; may be fatal if inhaled or absorbed through skin.
· Fire will produce irritating, corrosive and/or toxic gases.
· Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
· Runoff from fire control or dilution water may cause environmental contamination.
FIRE OR EXPLOSION
· Substance does not burn but will support combustion.
· Vapors from liquefied gas are initially heavier than air and spread along ground.
· These are strong oxidizers and will react vigorously or explosively with many materials including fuels.
· May ignite combustibles (wood, paper, oil, clothing, etc.).
· Some will react violently with air, moist air and/or water.
· Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices.
· Containers may explode when heated.
· Ruptured cylinders may rocket.
PUBLIC SAFETY
· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.
· Keep unauthorized personnel away.
· Stay upwind, uphill and/or upstream.
· Many gases are heavier than air and will spread along the ground and collect in low or confined areas (sewers, basements, tanks, etc.).
· Ventilate closed spaces before entering, but only if properly trained and equipped.
PROTECTIVE CLOTHING
· Wear positive pressure self-contained breathing apparatus (SCBA).
· Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE.
· Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.
EVACUATION
Immediate precautionary measure
· Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
Spill
· See Table 1 - Initial Isolation and Protective Action Distances.
Fire
· If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.
In Canada, an Emergency Response Assistance Plan (ERAP) may be required for this product. Please consult the shipping paper and/or the ERAP Program Section (page 390).
EMERGENCY RESPONSE
FIRE
Small Fire
CAUTION: These materials do not burn but will support combustion. Some will react violently with water.
· Contain fire and let burn. If fire must be fought, water spray or fog is recommended.
· Water only; no dry chemical, CO2 or Halon®.
· Do not get water inside containers.
· If it can be done safely, move undamaged containers away from the area around the fire.
· Damaged cylinders should be handled only by specialists.
Fire Involving Tanks
· Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles.
· Cool containers with flooding quantities of water until well after fire is out.
· Do not direct water at source of leak or safety devices; icing may occur.
· Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.
· ALWAYS stay away from tanks engulfed in fire.
· For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn.
SPILL OR LEAK
· Do not touch or walk through spilled material.
· Keep combustibles (wood, paper, oil, etc.) away from spilled material.
· Stop leak if you can do it without risk.
· Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material.
· Do not direct water at spill or source of leak.
· If possible, turn leaking containers so that gas escapes rather than liquid.
· Prevent entry into waterways, sewers, basements or confined areas.
· Isolate area until gas has dispersed.
· Ventilate the area.
FIRST AID
· Call 911 or emergency medical service.
· Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.
· Move victim to fresh air if it can be done safely.
· Give artificial respiration if victim is not breathing.
· Do not perform mouth-to-mouth resuscitation if victim ingested or inhaled the substance; wash face and mouth before giving artificial respiration. Use a pocket mask equipped with a one-way valve or other proper respiratory medical device.
· Administer oxygen if breathing is difficult.
· Clothing frozen to the skin should be thawed before being removed.
· Remove and isolate contaminated clothing and shoes.
· In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes.
· Keep victim calm and warm.
· Keep victim under observation.
· Effects of contact or inhalation may be delayed.
ERG 2020

Protective Distance

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
1017 Chlorine 200 ft 0.2 mi 0.9 mi See Table 3 Below

UN1017 Chlorine: Large Spills

Rail tank car
Highway tank truck or trailer
Multiple ton cylinders
Multiple small cylinders or single ton cylinder
Transport container Rail tank car
First ISOLATE in all Directions 3,000 ft
Then PROTECT downwind
DAY
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

6.3 mi

4.2 mi

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

7+ mi

5.7 mi

4.3 mi
Transport container Highway tank truck or trailer
First ISOLATE in all Directions 2,000 ft
Then PROTECT downwind
DAY
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

3.6 mi

2.1 mi

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

4.3 mi

3.1 mi

2.5 mi
Transport container Multiple ton cylinders
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)

1.3 mi

0.8 mi

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

2.5 mi

1.5 mi

0.8 mi
Transport container Multiple small cylinders or single ton cylinder
First ISOLATE in all Directions 500 ft
Then PROTECT downwind
DAY
Low Wind
(< 6 mph)
Moderate Wind
(6 - 12 mph)
High Wind
(> 12 mph)

0.9 mi

0.5 mi

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

1.8 mi

0.8 mi

0.4 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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