Results for "ph indicator"
5 colours found.
#E32636
Alizarin
A deep red dye first made from madder roots, later produced from coal tarDye · 🇹🇷 Turkey +1
Purple and violet
Logwood
A tree whose wood yields a dye once vital for textiles and scienceColour named from nature · 🇲🇽 Mexico +3
#E32600
Methyl orange
An orange-red azo dye used as a pH indicator in chemistryDye
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
Photo credits on this page
The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.
- Logwood: Kurt Stüber [1], CC BY-SA 3.0, source
- Alizarin: M. Girard - University of Kansas, CC BY-SA 4.0, source
- Methyl orange: Rubashkyn, CC BY-SA 3.0, source
- Patent Blue V: Oz1sej, CC0, source