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Cryogenic Safety
| Refrigerators and freezers |
An explosion-proof fridge must be
used for chemicals. Do not use your refrigerator or freezer as a dump.
Make sure everything you put in is tightly sealed in a way that will
not leak when cold. Check the contents frequently and discard unwanted
samples. Food must never be stored in a refrigerator used
for chemicals. |
| Liquid N2/ Solid CO2 |
These substances can freeze-burn you. Equipment
cooled outside by liquid N2 but open to air will allow liquid O2 to
form inside which can create a dangerous pressure rise on warming
or an explosion with flammable material. Use liquid nitrogen to cool
sealed or evacuated systems only.
See http://www.chemistry.nus.edu.sg/PSSO/Safety/Risk/cryogenic.htm
for handling, transportation and storage of liquid nitrogen. |
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