Red Cabbage Indicator

Safe, easy, and fun household or classroom experiment!

How does it work?

The Red Cabbage Indicator works because red cabbage contains a pigment molecule called flavin, which changes color in result to change in its hydrogen ion concentration. Neutral solution (such as the water used to create the indicator) will turn its color purple. Acidic solutions (such as lemon juice and vinegar) can be used to turn the indicator a red color. Basic solutions (such as baking soda and ammonia) can be used to turn the solution a greenish-yellow.
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Red Cabbage Indicator after experiment

Why you should buy our indicator

Our indicator is a safe, practical, and fun experiment whether you want to perform it at home or in the classroom. At home, its a fun experiment you can do with various household acids and bases along with our list of suggested acid and bases. In the classroom, its an interesting and fun experiment to teach your students about the science behind pH and to distinguish the differences between acids and bases.

Watch the Indicator in action!
The Sci Guys: Science at Home - SE2 - EP4: Red Cabbage pH Indicator - Acid Base Indicator


Fruit Juice (lemon, orange, tomato)

Baking Soda
Washing Detergent