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The Kid Should See This

Guinness World Record Elephant Toothpaste Reaction

What does it look like when you make elephant toothpaste reaction in a glass? Or in a tapered flask? How about a pool?

In this colorful chemistry video, science and engineering YouTuber Mark Rober and ‘Science Bob’ Pflugfelder set off a Guinness World Record-setting Elephant Toothpaste Reaction in a back yard pool.

We also get to see a handful of the 150+ tests and demonstrations they tried out before the big finale. Reminder: Do not try this experiment without appropriate safety gear and adult supervision. An explanation from Science Bob:

Hydrogen peroxide is basically water (H2O) with and extra oxygen (making it H2O2 ) But don’t be fooled into thinking it is close to water. Concentrated hydrogen peroxide can result in a strong chemical burn if it gets on your skin.

elephant toothpaste - mark rober
elephant toothpaste - mark rober
elephant toothpaste - mark rober

To create the elephants toothpaste reaction a second chemical is added (know as a catalyst) which basically tears-apart the hydrogen peroxide into water while releasing Oxygen gas inside the bubbles.

The reaction can be triggered in lots of ways. In all the videos other than the giant pool version, we use a solution of Potassium Iodide to break apart the molecules.

For the pool version, we wanted it to be safe to touch, so we started with a diluted hydrogen peroxide solution and used off-the-shelf dry yeast mixed with water as the catalyst. Yeast contains an enzyme called Catalase that does the job of breaking down the hydrogen peroxide. It also creates a kind of foam that tends to hang around a bit longer.

Science Bob has the fantastic foamy fountain yeast recipe on his site. Mark Rober also shared this extra video footage on Twitter:

Watch these videos next: The Golden Rain Experiment, Soap-Powered Boats, Chemiluminescence: BytesizeScience’s glowing chemistry demo, and Brusspup’s Giant Bubbles + Dry Ice Experiment.

Plus: The powder that can turn sludge into clean drinking water.

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