When filtering something what was dissolved in ether, it is common that it will foam and looks like this. the only problem is, that it could be easily sucked into the vacuum pump.
When filtering something what was dissolved in ether, it is common that it will foam and looks like this. the only problem is, that it could be easily sucked into the vacuum pump.
How funny~ Was filtering Nitrated methylbenzoate (recrystalising with methanol) today and it looked just like this.
Nothing is worse than losing all your nice clean solution after filtering multiple times.