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AMMONIA (ANHYDROUS) ICSC: 0414
Date of Peer Review: March 1998

 (cylinder)
CAS # 7664-41-7 NH3
RTECS # BO0875000 Molecular mass: 17.03
UN # 1005
EC Index # 007-001-00-5
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Flammable.
NO open flames, NO sparks, and NO smoking.
In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION Gas/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting.
In case of fire: keep cylinder cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!

Inhalation Burning sensation. Cough. Laboured breathing. Shortness of breath. Sore throat. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Skin burns. Pain. Blisters. ON CONTACT WITH LIQUID: FROSTBITE.
Cold-insulating gloves. Protective clothing.
ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.
Eyes Redness. Pain. Severe deep burns.
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion


SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Remove gas with fine water spray. Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus.
EU Classification
Symbol: T, N
R: 10-23-34-50
S: (1/2-)-9-16-26-36/37/39-45-61
UN Classification
UN Hazard Class: 2.3
UN Subsidiary Risks: 8
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-20S1005 or 20G2TC
NFPA Code: H3; F1; R0;
Fireproof. Separated from oxidants, acids, halogens. Cool. Keep in a well-ventilated room.
IPCS
International
Programme on
Chemical Safety 		Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities © IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
AMMONIA (ANHYDROUS) ICSC: 0414
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS, WITH PUNGENT ODOUR.

PHYSICAL DANGERS:
The gas is lighter than air.

CHEMICAL DANGERS:
Shock-sensitive compounds are formed with mercury, silver and gold oxides. The substance is a strong base, it reacts violently with acid and is corrosive. Reacts violently with strong oxidants and halogens. Attacks copper, aluminum, zinc and their alloys. Dissolves in water evolving heat.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 25 ppm as TWA; 35 ppm as STEL; (ACGIH 2004).
MAK: 20 ppm, 14 mg/m³; Peak limitation category: I(2); Pregnancy risk group: C; (DFG 2004).
 		ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Inhalation of high concentrations may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite.
PHYSICAL PROPERTIES
Boiling point: -33°C
Melting point: -78°C
Relative density (water = 1): 0.7 at -33°C
Solubility in water, g/100 ml at 20°C: 54
Vapour pressure, kPa at 26°C: 1013
Relative vapour density (air = 1): 0.59
 		Auto-ignition temperature: 651°C
Explosive limits, vol% in air: 15-28
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms.
NOTES
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
© IPCS, CEC 2005 
See Also:
        Ammonia (EHC 54, 1986)
        Ammonia, anhydrous (CHEMINFO)