I have a pretty decent amount of glassware, a lot of it I buy from Biotech Bargans and they buy it from colleges or companies that have labs and are
shutting down or getting rid of excess glassware. A lot of what I get is Pyrex, Chemglass, Ace, Laboy, etc. And I try to steer clear of anything
that's soda-lime. I know the difference between PYREX and pyrex. And according to this article, you can tell the difference between borosilicate and soda-lime by the color of the edges:
Quote: | If you have a dish at home that you want to test you can also try just looking at the hue. If you look at the edge of a dish and it is made out of
soda-lime glass it will be a blueish-green hue. If the glass is Borosilicate then you should not see any color. |
So this was my quick test that I would use, but the problem is - A lot of the PYREX stuff I have (some of it was new, some used) has that green color.
And I tested some of this by cranking my hotplate up to pretty high temperatures and then putting the glassware on it, filled with cold water to see
if it would break (as well as some other tests that break things like salsa jars pretty easily), and I haven't had any of them break.
I've never had any of these break or crack during any experiments/synthesis I've done, and I have definitely abused some of it quite a bit.
I posted some pictures to an Imgur album and put captions to each one. https://imgur.com/a/XEUXJB7
Im hoping someone can make some of these make sense. I could maybe believe that some of my Pyrex is fake, but all of it? No way. Some of it is from
Germany, some from BiotechBargans, some from other sellers. |