So regardless of the type of plastic high temperatures will cause chemicals to leach into.
Microwave safe plastic symbol.
Here is a little tip for you.
This symbol can vary a lot sometimes showing an image of a microwave or sometimes a dish set below radiation waves but the squiggly lines are a constant.
After being microwaved the plastic feels cool.
The easiest way to figure out if a plastic container is safe for the microwave is to look for the microwave safe symbol.
This symbol indicates that the product is designed to be used in the microwave.
Squiggly lines indicate that your container is microwave safe.
All plastics are derived from petroleum however.
Type 5 polypropylene is most often labeled microwave safe this plastic is sturdy and heat resilient and it stays clear even when exposed to tomato sauce.
The symbols on your food containers are actually really important microwave safe logos microwave ovens dishwasher laundry symbol tableware container png plastic container symbols for food grade plastics this is plastics safe to use in the microwave food atom symbol on plastic container.
When using the microwave it is best to remove the container lid and then heat according to the power indicated see temperature symbol.
So you can safely reheat or defrost food in it in a microwave oven.
Check for a symbol that looks like a mini microwave with wavy lines on the door to know that your container or cookware is microwave safe.