Thermo Scientific Revco ULT1790-10-A Operating Manual page 108

Appendix A
Handling Liquid Carbon Dioxide
A -4 Revco CxF
Handling Liquid CO
Appendix B
Warning High concentrations of CO
Standards specify that employee exposure to carbon dioxide in any eight-
hour shift of a 40-hour work week shall not exceed the eight-hour time
weighted average of 5000 PPM (0.5% CO
limit for 15 minutes or less is 30,000 PPM (3% CO
monitors are recommended for confined areas where concentrations of
carbon dioxide gas can accumulate.
Store and use liquid CO
As the liquid evaporates, the resulting gas tends to displace the normal air
from the area. In closed areas, excessive amounts of CO
concentration of oxygen and can result in asphyxiation. Because CO
is colorless, odorless and tasteless, it cannot be detected by the human
senses and will be breathed as if it were air. Breathing an atmosphere that
contains less than 18% oxygen can cause dizziness and quickly result in
unconsciousness and death.
Note The cloudy vapor that appears when liquid CO
is condensed moisture; not the gas itself. The issuing gas is invisible.
Never dispose of liquid CO
may enter.
Disposal of liquid CO
liquid slowly on gravel or bare earth where it can evaporate without
causing damage. Do not pour the liquid on pavement.
gas can cause asphyxiation! OSHA
2
). The short term exposure
2
s
only in a well-ventilated place.
2
in confined areas or places where others
2
should be done outdoors in a safe place. Pour the
2
2
). Carbon dioxide
2
gas reduce the
2
gas
2
is exposed to the air
2
s
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