Pyrex is not safe at 450 F as it can shatter at temperatures above 425 F.
Pyrex cookware can withstand temperatures in the oven up to 425 F.
Pyrex is safe for the oven up to 425 F degrees as long as the Pyrex is at room temperature when it's put in the oven.
Vintage Pyrex bowls can go in the oven as they are oven safe as well as microwave safe.
As long as the Pyrex bowls are not cold such as from the freezer to oven they will be safe in the oven up to 425 F degrees.
Old Pyrex and new Pyrex can go in the microwave as well as the oven.
Pyrex is both microwave safe and oven safe.
Pyrex gets so hot in the microwave because of the glaze of the Pyrex.
It's normal and OK for the Pyrex to get hot in the microwave but just use oven mitts to avoid getting burned.
Pyrex is good in ovens up to 932 F degrees.
Pyrex can withstand temperatures of up to 932 degrees F.
So Pyrex can safely be used in a home oven because you're never gonna cook in a home oven to 932 F degrees.
Just make sure the Pyrex cookware is not coming from a cold freezer or refrigerator and then going directly into the oven.
If that happens the temperature change causes thermal shock which can shatter and break the Pyrex.
Also do not use the Pyrex cookware on any stove top whether electric or gas stove top burners because it can crack and break and shatter the Pyrex.
Pyrex is only meant to be used in a preheated oven.