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Halloween : Special Effects Gases
Status: student, Grade: 6-8
Location: MI, USA
Date: April 2009
Are there any gases that can be made, that are not harmful whatsoever to the human body, and have no effects, but look like so poisonous gas. We are making a movie for science class and my teacher said it should be a secret agent one but still with science.
You could always use dry ice, which produces a colorless gas. It is the sublimation of solid carbon dioxide (CO2) at any temperature above -78.5 °C (-109.3 °F) and at atmospheric pressure to form CO2 gas. It is commonly used for Halloween props and movies.
However, safety precautions must be taken when handling the dry ice as it is extremely cold, having a sublimation point of -78.5 °C (-109.3 °F), and must be handled with suitable gloves to avoid severe burns. Additionally, as with any gas, it should be used in a well-ventilated area because any gas can become toxic in higher concentrations as it displaces the oxygen that we breathe.
Just do all the research necessary to ensure you are taking all necessary safety precautions.
Another idea: If you want to “color” the gas, you could always try shining different colored lights on the gas to give it a “poisonous” appearance. Good luck and please be safe.
Hope this helps,