Methylene blue
Simon Cotton takes a look at those compounds that find themselves in the news or relate to our everyday lives.
The indicator used in the 'blue bottle' reaction?
Yes. Methylene blue, or methylthioninium chloride, is used in the classic demonstration of chemical kinetics. An aqueous solution is made up of methylene blue with a strong alkali such as sodium hydroxide, plus glucose. On shaking, this colourless solution turns blue, and on standing, the colour disappears.
Why is this?
Simon Cotton discusses methylene blue
Make your lessons pop
Choose an account option to continue exploring our full range of articles and teaching resources