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Can I use a microwave safe plastic container to bake in an electric oven?

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4 Answers

No. It will most likely melt. Once this happens, inner surfaces of your oven will be coated with molten plastic which will smoke and smell foul, and probably never come off. Every time you use your oven it will smoke all over again until it's as carbonized as it's going to get. Don't do it.

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Here is a list of common plastics found in kitchen containers. You will find this information on the bottom of the container, in a triangle with a number inside.

While some plastics used in microwavable applications appear to have a high melting point, PET for instance melts at 510ºF, please remember that the material will soften, weaken and otherwise degrade long before actually melting into liquid. Other plastics labeled microwave safe, like HDPE, melts at a mere 265ºF! While microwave safe plastics may have a relatively high short term temperature resistance, sustained temperature tolerance, as in leaving it in an oven for baking, is much lower.

Silicone bakeware, by contrast, has a melting point of 935ºF, but is only rated for use at sustained temperatures no greater than 675ºF. Above that point, and the material will soften, warp and degrade. Thermoplastics have a much lower melting point, and it can be expected that their sustained temperature resistance is likewise much lower, to the point where using them as bakeware is unadvisable.

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No. The heating mechanisms are different, and the oven will probably be hotter than the melting point of the plastic (which is often around 150-300 F, and maybe slightly higher depending on the kind of plastic).

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Plastic in baking oven = anathema.

In street language,
Anathema = gross, banned, ridiculously evil, unacceptable idiocy, banishment.

You will/should be exiled and banned from the kitchen, if you do that.

a·nath·e·ma (-nth-m)
n. pl. a·nath·e·mas
1. A formal ecclesiastical ban, curse, or excommunication.
2. A vehement denunciation; a curse: "the sound of a witch's anathemas in some unknown tongue" (Nathaniel Hawthorne).
3. One that is cursed or damned.
4. One that is greatly reviled, loathed, or shunned:

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I understand why your answer is getting downvoted, but I agree that using plastic in an oven warrants some sort of banishment from the kitchen. ;-) –  Carey Gregory Oct 26 '13 at 1:30
    
There certain things in life where one should indulge oneself, to the risk of societal rejection, as a delusional prophet vehemently warning others of the mess such things would create in our lives. Use of plastic ware in a baking oven is one of those things. –  Blessed Geek Oct 27 '13 at 22:35
2  
-1: This answer essentially just says "no"; the rest is window dressing. A good answer might mention why, as obvious as it may seem. –  Jefromi Oct 27 '13 at 23:23
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