Pyrex glass round casserole safety in high temperature
I want to know can I use Pyrex glass round casserole as a safe cookware on gas burner?
Does this cookware release toxic chemical in high temp?
I only worried about toxic compounds and not about cracking!
Best Answer
Update based on edited question: there are no issues of toxicity.
It is a very poor idea to use glass cookware on a burner. Not all Pyrex is made from high quality borosilicate glass anymore, and even if you have some, the issue is thermal shock, not toxicity.
If you heat or cool glass very rapidly, the internal stress caused by thermal expansion (or contraction, when cooling) can cause it to shatter. This can be a real safety issue when it is full of hot food.
For this reason, you generally only want to use glass cookware in the oven, and never transfer it directly from the freezer to the oven, or the oven to the freezer.
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Can Pyrex withstand high heat?
High Temps Pyrex cookware is meant to withstand baking, but it cannot be trusted for use over 425 degrees. This means that for recipes requiring higher temps you should use metal pans.Can a Pyrex dish go in a 450 degree oven?
Pyrex is meant to be able to withstand higher temperatures. But everything has its limitations. Pyrex can be used safely inside an oven that is less than 450 degrees F. Whether or not it's inside a conventional oven or a convection oven, this glassware will be safe to use so long as that temperature isn't exceeded.Can a Pyrex dish go in a 400 degree oven?
You can use a Pyrex oven-safe dish in a 400-degree oven. Before the first Pyrex pie plate was manufactured in 1916, home cooks didn't have access to glass bakeware that withstood both high and low temperatures without breaking.What temperature will break Pyrex?
Is Pyrex glassware susceptible to shattering? Shattering is relatively rare, but it can happen when glassware is exposed to sudden temperature changes (known as thermal shock), extremely high heat (over 425 degrees), or direct heat.Glass Explosion at 343,000FPS! - The Slow Mo Guys
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Answer 2
The symbols for that glassware do not indicate stove top use.
I have owned glassware (Corning Ware Visions) that was specifically build for stove top use, the design, glass color and symbols designation were different. The 300 degree centigrade rating would be on the low side for a gas flame (900 - 1500 deg C).
I also have personally had oven-safe cookware fail when using on an electric hob. It crumbled after a while and contents went everywhere, so I definitely wouldn't risk it.
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