To use all functions of this page, please activate cookies in your browser.
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
Disappearing rainbow indicator
Disappearing Rainbow Indicator is a pH indicator that has different colors to indicate the range of the pH of the solution it is in. This is opposed to indicators like phenolphthalein which have only two different colors and are able to indicate only whether the pH is above or below a certain point by using the various pH values of the indicators. It usually has the following composition:
Disappearing rainbow indicator is a flammable liquid. It is moderately toxic by inhalation or ingestion, and is an irritant.
Colors and meanings
The colors follow those of the visible spectrum of light. The pH number is compared with the color. Anything below 7 is acidic (the lower the pH, the more acidic it is), 7 is neutral (neither acidic or alkali) & anything above 7 is alkali (the higher the pH, the more alkali it is)
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Disappearing_rainbow_indicator". A list of authors is available in Wikipedia.|