xNxOxCxAxSxHx Posted July 10, 2005 Report Share Posted July 10, 2005 Is there a chemical that is non-toxic, clear, and goes from clear to a color when it comes into contact with oxygen or carbon dioxide? kind of like how blood turns red when it comes into contact with oxygen. Quote Link to comment Share on other sites More sharing options...
UncleAl Posted July 11, 2005 Report Share Posted July 11, 2005 Leucomethylene blue - colorless when reduced to deep blue when oxidized, and reversible. Classic demo is a trace of methylene blue plus glucose in water, shaken in a jar with air. Basic phenolpthalein will reversibly decolorize with CO2, but it will be slow. Quote Link to comment Share on other sites More sharing options...
xNxOxCxAxSxHx Posted July 11, 2005 Author Report Share Posted July 11, 2005 i was thinking maybe a chemical that is cheap to produce, like for use in a sales product. I read up on Leucomethylene blue and it is used to lower the levels of methaemoglobin in red blood cells, sounds kinda expensive. Quote Link to comment Share on other sites More sharing options...
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