Can You Microwave Styrofoam?
Most styrofoam should not be microwaved. Traditional styrofoam can melt, warp, and potentially release harmful chemicals when heated. However, some food containers are made from microwave-safe polystyrene and will be labeled as such. Always check for a microwave-safe symbol before heating.
Key Takeaways
- Styrofoam is a brand name for expanded polystyrene foam.
- Even microwave-safe containers should not be used if they are cracked, old, or damaged.
- Styrofoam cups for hot beverages are not the same as microwave-safe containers - do not microwave them.
Explanation
Styrofoam is a brand name for expanded polystyrene foam. When heated, it can melt or deform, and there are concerns about styrene and other chemicals leaching into food, especially fatty or oily foods which absorb these compounds more readily.
Microwave-safe polystyrene containers do exist and are specifically designed to withstand microwave temperatures without melting or leaching. Look for a microwave-safe label, often shown as wavy lines, or the words 'microwave safe' on the bottom.
When in doubt, transfer food to a glass, ceramic, or microwave-safe plastic container before heating. This takes just a moment and eliminates any risk of container damage or chemical exposure.
Things to Know
- Even microwave-safe containers should not be used if they are cracked, old, or damaged.
- Styrofoam cups for hot beverages are not the same as microwave-safe containers - do not microwave them.
- One-time-use containers from restaurants are rarely microwave-safe even if made from sturdy-seeming materials.