Hello everyone,
I am looking for any dye that can be used to determine the flow of liquid in a tube. Therefore, it should not affect tissues and cells or bind to nucleic acids or proteins. Additionally, it should be easy to wash off.
Any suggestions would be greatly appreciated.
Cheers
Adam B Shapiro
Fluorescein is a cheap dye that is water soluble at pH >6. It's innocuous as far as I know. It's also fluorescent, so you can detect it at very low concentrations, if necessary.
Phenol red is the red dye that is added to cell culture media as a pH indicator, so it must be pretty innocuous. It is red at neutral pH, pinkish at alkaline pH and yellow at acid pH.
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