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How to Dissolve Polystyrene

Polystyrene foam combines polystyrene particles with air to create a material that protects fragile materials during shipping or to create a lightweight material capable of storing liquid materials. Dissolving polystyrene requires an organic fluid rather than a solvent. Acetone is one polystyrene dissolving fluid is found at a pharmacy, grocery store or convenience store. Acetone -- nail polish remover -- is an organic fluid that does not require a special license to purchase and does not create toxic fumes during use.

Things You'll Need

Rigid plastic container
Acetone
Plastic spoon

Instructions

- 1
  Set a rigid plastic container on a stable work surface that sits in a well ventilated area away from open flames.
- 2
  Pour acetone in the rigid plastic container until the fluid level sits 1/2 to 3/4 inch above the container's bottom.
- 3
  Place a piece of polystyrene foam in the rigid plastic container. Allow the polystyrene to sit until it dissolves in the acetone.
- 4
  Remove the dissolved polystyrene by scooping it from the acetone with a plastic spoon. Dispose of the plastic spoon and the polystyrene by throwing it in a garbage bag.
- 5
  Pour the acetone back into the container after the dissolved polystyrene has been removed.

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