Nitrogen tetroxide

CAS RN: 10544-72-6

DOT Emergency Guidelines

If THERE IS NO FIRE, go directly to protective distances to obtain initial isolation and protective action distances. IF THERE IS A FIRE, or IF A FIRE IS INVOLVED, go directly to the EVACUATION information shown below under PUBLIC SAFETY.

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 - .
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.
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

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