Do you have any questions about something? Email us!
Kinderen dragen veiligheidsbrillen en kijken naar een demonstratie van het olifantentandpasta-experiment in een klaslokaal.

Making elephant toothpaste (practical preparation)

Making elephant toothpaste is a well-known and popular chemical experiment. In this experiment, an impressive amount of foam is produced by the decomposition of hydrogen peroxide. This experiment is not only fun to watch, but also educational, because it shows how catalysts work. This article discusses step-by-step how you can safely perform this experiment yourself with both 3% hydrogen peroxide and 12% hydrogen peroxide .

What do you need?

  • Hydrogen peroxide (H₂O₂) 3% or 12%
  • Liquid detergent, such as Dreft
  • Dry yeast (as catalyst)
  • Food coloring (optional)
  • Hot water
  • Large bottle or cylinder (e.g. an Erlenmeyer flask )
  • Tray or container to catch spills
  • Gloves and safety glasses
  • Measuring cups and spoon

Safety regulations⚠️

  • Always wear safety glasses and gloves when working with hydrogen peroxide.
  • Conduct the experiment outdoors or in a well-ventilated area
  • Take extra care when handling 12% hydrogen peroxide as it is more corrosive than 3%
  • Keep your distance when you initiate the experiment

Step-by-step guide to making elephant toothpaste

  1. Prepare your workplace
    • Ensure a clean and tidy workplace
    • Place a tray or bath under the bottle or cylinder to catch the foam
  2. Mix the ingredients
    • When using 3% hydrogen peroxide, pour approximately 100 ml into your bottle or cylinder. If you are using 12% hydrogen peroxide, pour approximately 50 ml into your bottle or cylinder.
    • Add a few drops of food coloring to the hydrogen peroxide to color the mixture.
    • Add 1 tablespoon of liquid dish soap to the hydrogen peroxide and mix gently by slightly rotating the bottle or cylinder.
  3. Prepare the catalyst solution
    • In a separate cup or bottle, dissolve 1 tablespoon of dry yeast in about 3 tablespoons of warm water. Then stir this mixture well until the yeast has completely dissolved.
  4. Start the reaction
    • QUICKLY but CAREFULLY pour the yeast solution into the bottle containing your hydrogen peroxide.
    • Immediately step back and observe the production of the elephant toothpaste
  5. Observations
    • Note what happens once the yeast solution is added to the hydrogen peroxide solution
    • Observe the amount of foam produced, the rate of the reaction and any changes in temperature (exothermic reaction).
  6. Tidy
    • After the reaction, discard the foam and solution residue according to your school or laboratory safety guidelines.
    • Clean all materials used thoroughly.

Theory for making elephant toothpaste

The decomposition of hydrogen peroxide by a catalyst such as enzymes in yeast results in the following reaction:

2 H 2 O 2 (aq) → 2 H 2 O (l) + O 2 (g)

The oxygen gas (O₂) formed is captured by the detergent, resulting in the production of foam. The reaction is exothermic, meaning heat is released.


This experiment shows how a catalyst accelerates the decomposition of hydrogen peroxide, resulting in spectacular foam production, better known as elephant toothpaste. It is a fun and educational way to learn more about chemical reactions and catalysts. Always perform the experiment with proper safety precautions and enjoy the impressive results!

Persoon wijst naar het element Ruthenium in een interactieve weergave van het periodiek systeem der elementen.

Convert grams to moles calculator

The Mole is an essential unit in chemistry that bridges the gap between the microscopic world of atoms and molecules and our macroscopic reality. It represents 6.022×10^23 particles of a substance, based on the number of carbon atoms in 12 grams of pure carbon-12. The article explains step-by-step how to calculate the molecular mass of a substance, using sodium hydroxide as an example, and then how to convert this mass to Mole. With a molecular mass of 39.997 u for sodium hydroxide, it shows how 100 grams of this substance can be converted into 2.50 Mole. A handy Mole calculator is provided to facilitate these calculations, along with tips for performing these calculations and calculating the molarity of a solution.
Open EHBO-kit met diverse inhoud zoals pleisters, verband, schaar, handschoenen, en antiseptische doekjes netjes gerangschikt.

What’s in a first aid kit?

A first aid kit is essential for providing first aid in case of accidents at home, at work, during travel or sporting activities. A basic first aid kit contains plasters, bandages, disinfectants, instruments such as scissors and tweezers, protective equipment such as gloves, and essential medications including painkillers and anti-allergy medications. It is important to personalize the kit to personal or specific needs and check it regularly for expired products. A well-equipped first aid kit, combined with knowledge of how to use it, can be crucial in emergency situations.
Gezond beplant aquarium met levendige waterplanten en vissen, geoptimaliseerd door NPK-bemesting

Aquarium fertilization calculator

Effective NPK fertilization in the aquarium is essential for the health of plants and fish. By using a basic test set, you can regularly check the water values ​​and accurately dose the required nutrients. The ideal nitrate level is between 10 and 25ppm. Dosage adjustments are dependent on measured values, with a divided schedule over several days recommended for stability. If nitrate levels are too high, often caused by overfeeding or insufficient water changes, changing the water is the only solution. Regular monitoring and adjustment of water quality support a healthy aquarium ecosystem.
Een vorkheftruck tilt gestapelde Intermediate Bulk Containers (IBC's) in een industrieel magazijn.

Chemicals | Wholesaler and Supplier

As a leading wholesaler, DutchChems offers a wide range of chemicals, suitable for both large and small projects. The company stands for quality, safety and compliance with strict regulations, while catering to a diverse customer base. With more than 200 products, including acids, bases, metals and organic compounds, DutchChems meets the needs of industry, education and research. The emphasis is on safe and sustainable use of chemicals, supported by expert advice and an informative helpdesk. DutchChems strives for innovation and safety in the chemical sector.
Antivries wordt gegoten vanuit een fles in het koelsysteem van een auto.

Antifreeze | Types, Applications and Misconceptions

This article delves into the essential world of antifreeze, highlighting the various types such as ethylene glycol and propylene glycol, and their specific applications in vehicle cooling systems and beyond. It emphasizes the importance of antifreeze in both hot and cold climates, and not just as protection against freezing. In addition, the article addresses common misconceptions such as the interchangeability of antifreeze products and the need for regular replacement to ensure optimal performance. The article concludes with the importance of safe use and environmental impacts of antifreeze, promoting awareness and responsibility among the reader.
Nagellak Verwijderen met Nagellakremover

Nail Polish Remover | With or without Acetone

Learn all about nail polish remover, including the different types such as acetone-based and non-acetone. Find out why it's important to be careful with acetone-based removers, especially on dry nails, and consider gentler alternatives. Learn how to moisturize your nails after removal and why a well-ventilated area is important. This guide provides essential tips for effectively removing nail polish and maintaining healthy and beautiful nails.
Back to Top
Product has been added to your cart