Acid-base Indicator
- congo red
A red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and...
- methyl orange
An azo dye used as an acid-base indicator; used for titrations involving weak bas...
A red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and...
An azo dye used as an acid-base indicator; used for titrations involving weak bas...