International Chemical Safety Cards (WHO/IPCS/ILO)International Chemical 
      Safety Cards 
            NITROGEN (LIQUIFIED) ICSC: 1199 
            NITROGEN (LIQUIFIED)
            Liquid nitrogen
            Nitrogen (refrigerated liquid)
            Nitrogen (cryogenic liquid)
            (liquefied)
            N2
            Molecular mass: 28.01

            CAS # 7727-37-9
            RTECS # QW9700000
            ICSC # 1199
            UN # 1977

            TYPES OF
            HAZARD/
            EXPOSURE ACUTE HAZARDS/
            SYMPTOMS PREVENTION FIRST AID/
            FIRE FIGHTING 
            FIRE Not combustible. 

            In case of fire in the surroundings: all extinguishing agents 
            allowed. 

            EXPLOSION 




            EXPOSURE 



            INHALATION 
            Unconsciousness. Weakness. Death. See Notes. 
            Ventilation. Breathing protection. 
            Fresh air, rest. Artificial respiration if indicated. Oxygen may be 
            beneficial if administered by a trained person on physician's 
            advice. Refer for medical attention. 

            SKIN 
            ON CONTACT WITH LIQUID: FROSTBITE. 
            Cold-insulating gloves. 
            ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. 
            Refer for medical attention. 

            EYES 
            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 STORAGE PACKAGING & LABELLING 
            Ventilation. NEVER direct water jet on liquid (extra personal 
            protection: self-contained breathing apparatus). 
            Keep in a well-ventilated room. 
            Special insulated cylinder. 
            UN Hazard Class: 2.2

            SEE IMPORTANT INFORMATION ON BACK 
                  ICSC: 1199 Prepared in the context of cooperation between the 
                  International Programme on Chemical Safety & the Commission of 
                  the European Communities © IPCS CEC 1993 


      International Chemical Safety Cards 
            NITROGEN (LIQUIFIED) ICSC: 1199 

            I
            M
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            T

            D
            A
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                  PHYSICAL STATE; APPEARANCE:
                  ODOURLESS, COLOURLESS, EXTREMELY COLD LIQUID. 

                  PHYSICAL DANGERS:
                  Cold gas is heavier than air and can accumulate close to 
                  ground level causing oxygen deficiency with risk of 
                  suffocation. 

                  CHEMICAL DANGERS:
                  Reacts with oxygen and hydrogen on sparking forming nitric 
                  oxide and ammonia. Combines directly with lithium and at red 
                  heat with calcium, strontium and barium to form nitrides. 
                  Forms cyanides when heated with carbon in presence of alkalies 
                  or barium oxides. 

                  OCCUPATIONAL EXPOSURE LIMITS (OELs):
                  TLV not established. 


                  ROUTES OF EXPOSURE:
                  The substance can be absorbed into the body by inhalation. 

                  INHALATION RISK:
                  On loss of containment this liquid evaporates very quickly 
                  causing supersaturation of the air with serious risk of 
                  suffocation when in confined areas. See Notes. 

                  EFFECTS OF SHORT-TERM EXPOSURE:
                  Inhalation of gas may cause asphyxia. The liquid may cause 
                  frostbite. 

                  EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:


            PHYSICAL
            PROPERTIES
                  Boiling point: -195.8°C
                  Melting point: -210°C
                  Relative density (water = 1): see Notes
                  Solubility in water: none


            ENVIRONMENTAL
            DATA


            NOTES 
            Density of the liquid at boiling point: 0.808 kg/l. High 
            concentrations in the air cause a deficiency of oxygen with the risk 
            of unconsciousness or death. Check oxygen content before entering 
            area. Effects are the result of oxygen deficiency. Do not attempt 
            rescue without air supplied respirator. Transport Emergency 
                  Card: TEC (R)-112 
                  NFPA Code: H 3; F 0; R 0; 


            ADDITIONAL INFORMATION 



                  ICSC: 1199 NITROGEN (LIQUIFIED) 
                  © IPCS, CEC, 1993 


            IMPORTANT LEGAL NOTICE: Neither the CEC or 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. This card contains the 
            collective views of the IPCS Peer Review Committee and may not 
            reflect in all cases all the detailed requirements included in 
            national legislation on the subject. The user should verify 
            compliance of the cards with the relevant legislation in the country 
            of use.