Sciencemadness Discussion Board

Shut off magnetic stirring before you remove the flask from the stirrer...

stoichiometric_steve - 29-3-2008 at 14:33

...because the spinning stirring magnet could break the flask.

I just had to mop up approx. 600ml of AcOH with 18g Sulfuryl Chloride in it. Good thing this happened in a hood with 800m³/h :-/

evil_lurker - 29-3-2008 at 15:27

Lovely things happen when stir bars decouple don't they?

MagicJigPipe - 29-3-2008 at 16:24

You guys must have some weak flasks, heavy stirbars, super-fast stirrers or really bad luck.

This has happened to me literally hundreds of times (mostly because of suspended solids) and I have not had one breakage. Knock on wood.

len1 - 29-3-2008 at 16:55

I was sure this was an April Fools post. Ive done it many times and theres never even been a hint of what you describe. How many pounds does you stir bar weigh? Or is these some new chinese brand flasks?

[Edited on 30-3-2008 by len1]

stoichiometric_steve - 29-3-2008 at 23:37

Quote:
Originally posted by MagicJigPipe
You guys must have some weak flasks, heavy stirbars, super-fast stirrers or really bad luck.


that incident was a combination of all that, it was an old flask from the days when they thought 1mm wall thickness was enough. the stir bar was superstrong and egg-shaped.

too bad i lost like 1000 EUR worth of product. i wish this would be an april fools post, but it's not april yet. the worst thing is that i have no more sulfuryl chloride :(