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- Liquid Nitrogen Safety -
WARNING
LIQUEFIED GASES ARE EXTREMELY COLD LIQUIDS – LIQUID
NITROGEN EXISTS AT -196˚C. BECAUSE OF THESE COLD
TEMPERATURES, LIQUEFIED GASES WILL “BURN“ IF THEY
COME INTO CONTACT WITH SKIN. NEVER ALLOW DIRECT
SKIN CONTACT WITH LIQUID NITROGEN OR SERIOUS BURNS
WILL RESULT.
ALTHOUGH LIQUID NITROGEN ITSELF IS NON-TOXIC, WHEN
RELEASED INTO A CONFINED SPACE IT CAN DISPLACE OXYGEN
CAUSING ASPHYXIATION. ENTERING AN OXYGEN DEFICIENT
ROOM CAN CAUSE UNCONSCIOUSNESS WITHOUT WARNING.
ALWAYS CHECK AIR QUALITY UPON ENTERING A ROOM
WHERE CRYOGENIC LIQUIDS ARE BEING USED, AND IF
POSSIBLE, HAVE AIR RESPIRATORS AVAILABLE.
INTRODUCING EQUIPMENT WHICH IS AT ROOM TEMPERATURE
INTO LIQUID NITROGEN IS ALWAYS SOMEWHAT HAZARDOUS.
BEWARE OF SPLASHING AND “BOILING” WHICH MAY
OCCUR. ALL PERSONNEL PERFORMING THESE OPERATIONS
SHOULD BE FULLY INFORMED OF PROPER HANDLING
PROCEDURES, AND SHOULD ALWAYS WEAR A FACE SHIELD
AND PROTECTIVE CLOTHING.
LIQUEFIED GASES SHOULD NEVER BE USED IN COMBINATION
WITH OTHER SUBSTANCES WITHOUT KNOWING WHAT THE
RESULT WILL BE. WHEN IN DOUBT, CONTACT A COMPETENT
AUTHORITY.
IMPORTANT: The following section on LIQUID NITROGEN SAFETY should be read carefully
and followed completely, but is by no means a complete volume on the safe use of cryo-
genic liquids. All personnel should have a complete knowledge of the correct procedures,
as well as the hazards of working with liquid nitrogen. Failure to do so could result in
serious injury or death.
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