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Subject: Re: What are the rules on dry ice?
From: Kent Garber
Posted: Sat Jun 16. 2001, 16:55 UTC
Followup to: "What are the rules on dry ice?"  by diamond  (Sat Jun 16. 2001, 15:14 UTC)
This was an excellent question.  And these web sites will answer your 
questions.


http://www.west.net/~science/feedback_CO2.htm

Is it safe to drink the water when I mixed it with dry ice?

Not until the dry ice is completely gone! 
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Read the complete page at this web site.

http://www.west.net/~science/co2.htm

Carbonation 
Dry ice, being frozen CO2 gas, can be used to carbonate water to create 
sparkling water. Place some drinking water in a glass, and add some dry ice. 
Allow it to bubble. Water ice may form around the dry ice. If this happens you 
can either leave it alone, or break it up with a spoon to help the process 
along. When all of the dry ice is gone, taste the water that remains. It 
should taste slightly carbonated.
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http://www.howstuffworks.com/question264.htm

Dry Ice Safety
If you ever have a chance to handle dry ice, you want to be sure to wear heavy 
gloves. The super-cold surface temperature can easily damage your skin if you 
touch it directly. For the same reason you never want to taste or swallow dry 
ice either. 
Another important concern with dry ice is ventilation. You want to make sure 
the area is well-ventilated. Carbon dioxide is heavier than air and it can 
concentrate in low areas or in enclosed spaces (like a car or a room where dry 
ice is sublimating). Normal air is 78% Nitrogen, 21% Oxygen and only 0.035% 
Carbon Dioxide. If the concentration of carbon dioxide in the air rises above 
5%, carbon dioxide can become toxic. Be sure to ventilate any area that 
contains dry ice, and do not transport it in a closed vehicle.


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