C H E M I C A L  F A C T  S H E E T  f o r  e m e r g e n c y  r e s p o n d e r s

CHEMICAL: Ammonia Anhydrous

NH3 1005 7664-41-7 125 Yes Yes 100# 3 1 0
Chemical
Formula
UN # C.A.S. # ERG . # Hazardous
Substance
Extremely Hazardous
Substance
RQ Health Fire Reactivity

Characteristics Exposure Limits Common Uses
Appearance: Colorless; Pungent gas with suffocating Odor LEL: 16%
  • In chemical Industry, especially fertilizer manufacturing
  • Nitric Acids and explosives manufacturing
  • Refrigerant in food processing and storage
  • Building block in many chemicals such as cleaning fluids and synthetic fibers
    UEL: 25%
Specific Gravity: 0.68 IDLH: 500ppm
Flash Point: NA STEL: 35ppm
Auto Ignit.: 1204øF PEL: 25ppm*
Vapor Pressure: 8.5atm ERPG2: 200ppm
pH: 10.6-11.6 ERPG3: 1000ppm
Emergency Response PPE (Fire Fighters) Hazards
Respiratory: Use Full Face chemical cartridge respirator (GMD) for exposures up to 250ppm;
SCBA or airline respirator with escape pack for >250ppm (IDLH is 300ppm)
  • Vapors are extremely irritating and corrosive to eyes, nose, throat and lungs
  • Ammonia gas can combine with perspiration on the skin to form a caustic solution which attacks the skin
  • DOT Hazard Classification 2.2 Non-flammable gas
  • Does not readilu ignite, but may burn or explode if mixed with air.
Eye/Face/Body: Chemical protective clothing. Use structural fire fighting PPE for fire situation only, it is not effective in spill situations.

 

Emergency Medical Actions Incompatible
  • Remove contaminated clothing and/or articles.
  • Respiratory assistance/CPR as needed.
  • Flush with copious amounts of water for 15 minutes.
  • If concious, give water, do not induce vomiting.
  • Neutralizing agent = citrus fruit or diluted vinegar
  • Skin contact with liquid NH3 must be thawed.
  • Strong Oxidizers
  • Halogens
  • Acids
  • Silver/Zinc Salts
  • Mercury / chlorine / bromine
Notes Initial and Protective Action Distances
  • Vapors from liqueified gas will initially collect in low areas
  • Ammonia is not normally considered a serious or life-threatening hazard, as its odor is irritating and in large amounts intolerable causing people to seek relief.
  • Danger is when people are unable to leave the area as in a confined space
  • *OSHA PEL is 50ppm but NIOSH TLV is 25ppm
Small Spills <>
  • Initial Isolation 100'
  • Protect downwind
  • >1/10 mile (day), 1/5 mile (night)
Large Spills <>
  • Initial Isolation 300'
  • Protect downwind
  • >1/5 mile (day), 1/2 mile (night)

Emergency Response Actions
  • Stay away from ends of containers - they may rupture if exposed to heat
  • Do not get water inside container or onto large quantity of ammonia due to hydrochloric acid formation.
  • Small fire: dry-chem., CO2. Large fire: Regular foam or fine water spray. Fight fire from a maximum distance-use monitors in large tank.
  • Fires- Stop flow of gas before extinquishing the fire
  • Tank, railcar or truck fire- isloate 1 mile in all directions and prevent runoff from entering sewers. 1/99