How to Dissolve Styrofoam in Acetone

Styrofoam, a brand name for polystyrene foam, is a lightweight, insulating material commonly used in packaging and insulation. However, its disposal poses significant environmental challenges due to its non-biodegradable nature.

A surprising fact about Styrofoam is that it can be dissolved, but this process requires careful handling due to the potential dangers involved.

The Science of Dissolving Styrofoam

Styrofoam is composed of a polymer called polystyrene, which is essentially a long chain of styrene molecules. The key to dissolving Styrofoam lies in breaking down these molecular chains. Certain solvents, particularly acetone, are effective in this regard.

When Styrofoam comes into contact with acetone, it undergoes a process of depolymerization, breaking down the long chains of styrene into their individual components. This reaction dramatically reduces the volume of the Styrofoam, making it seem like it’s “melting.”

The Risks Involved

It’s crucial to understand that dissolving Styrofoam is not a harmless experiment. Acetone is a volatile, flammable substance that requires proper handling and ventilation.

More importantly, when Styrofoam dissolves in acetone, it forms a sticky, gooey substance that bears a disturbing resemblance to napalm.

Napalm, known for its use in warfare, is a highly flammable jelly-like substance. The dissolved Styrofoam mixture, while not exactly napalm, shares some of its properties and is often referred to as “napalm type B” in informal contexts.

A Strong Caution Against DIY Experiments

Given its hazardous nature, it is strongly advised not to attempt dissolving Styrofoam at home. The risks of fire, chemical burns, and toxic fumes are significant. Additionally, the disposal of the resulting substance poses environmental and health risks. This process should only be conducted in controlled, professional settings with appropriate safety measures.

Dissolving Styrofoam With Acetone (Video)

Environmentally-Friendly Alternatives

Instead of attempting to dissolve Styrofoam, consider eco-friendly alternatives:

  • Recycling: Some facilities specialize in recycling Styrofoam. Check with your local waste management services.
  • Reuse: Reuse Styrofoam for packaging or as part of DIY crafts.
  • Alternative Materials: Opt for biodegradable or recyclable materials for packaging and insulation.


The science behind dissolving Styrofoam is intriguing but fraught with risks. Understanding the environmental impact of Styrofoam and the dangers of its dissolution is crucial. We must prioritize safety and environmental responsibility, seeking sustainable alternatives rather than hazardous experiments.

Remember, curiosity and scientific exploration are valuable, but they should always be tempered with caution and respect for safety and environmental integrity.