Results for "indicator"
5 colours found.
#E32600
Methyl orange
An orange-red azo dye used as a pH indicator in chemistryDye
Purple and violet
Murexide
A purple chemical once used as a dye and indicator in chemistryPigment · 🇩🇪 Germany +1
Blue
Patent Blue V
A synthetic blue dye used in food, medicine, and chemistryDye
Orange
Chrysoine resorcinol
A synthetic azo dye once used in food and as a pH indicatorDye
Blue
Viologen
Organic compounds that switch between blue, violet and yellow when reduced or oxidisedPigment
Photo credits on this page
The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.
- Methyl orange: Rubashkyn, CC BY-SA 3.0, source
- Murexide: Shaddack, Public domain, source
- Patent Blue V: Oz1sej, CC0, source
- Viologen: Smokefoot, Public domain, source