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Old 05-10-2008, 04:10 PM   #1
gruversm
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Are all Pyrex Ehrlenmeyer flasks made of Borosilicate glass? I purchased a 1000ml flask to make a yeast starter and would like to use it directly on my gas stove to boil the DME needed to make a mini-starter.

Will I be OK doing it this way?

 
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Old 05-10-2008, 04:13 PM   #2
jowens
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Quote:
Originally Posted by gruversm View Post
Are all Pyrex Ehrlenmeyer flasks made of Borosilicate glass? I purchased a 1000ml flask to make a yeast starter and would like to use it directly on my gas stove to boil the DME needed to make a mini-starter.

Will I be OK doing it this way?
Worked for me, but I have only done it once so far.
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Old 05-10-2008, 11:40 PM   #3
sigmund
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As long as it's truly Pyrex, yes.

 
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Old 05-10-2008, 11:42 PM   #4
littlehop
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Some of mine say kymex which I think is also shock resistant borosilacate
glass and some say Pyrex. I have crash cooled both kinds in cold water right off the stove (stove is ceramic top)and had no problems.This is not to say that I don't wonder everytime if this is going to be the time it explodes.
I'd like to here from others who have not broken any.
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Old 05-11-2008, 12:00 AM   #5
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I too have gone from gas stove boiling to ice bath. Havent had a problem here. I have two 2000mL Pyrex flasks.
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Old 05-11-2008, 12:06 AM   #6
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Kimax http://en.wikipedia.org/wiki/Kimax = Bomex http://en.wikipedia.org/wiki/Bomex = Pyrex http://en.wikipedia.org/wiki/Pyrex
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Old 05-11-2008, 11:32 PM   #7
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Thanks to everyone who responded!

 
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