Apolo707, explosion after 6 month storage is absurd to me. Diisopropyl ether? Maybe. You need to keep the bottle like really opened,
maybe stopper lying upside-down on the neck or whatever. 1 L of air contains roughly 9 mg of oxygen, which is nothing even if it reacts fully with
ether.
The following quote of a peroxide test procedure proves my suggestion about them having no idea what the talk and what they do:
| Quote: | | shake 10 ml of ether with 1 ml of fresh 10% (w/v) potassium iodide solution and a few drops of hydrochloric acid. Peroxides liberate iodine and the
aqueous phase becomes yellow. If the result is uncertain, add little starch siolution. A blue colour results from a trace of liberated iodine.
|
First of all, that's an arbitrary modification of a rarely used general peroxide test, which cannot be applied to ether due to its immiscibility.
Probably they've picked this one because it provides the highest ether to water ratio. But this procedure will procduce most of the iodine in the
ether layer.
Second, starch does not produce blue color in the presence of ether. For this reason the KI-starch method was removed from many pharmacopoeias,
despite the fact starch actually rises sensitivity.
That highlights my point: those people are FUCKING DUMB, and yet they provide advises about something they don't know, that's why they work at some
school or colledge and not in a research facility. In the colledge nobody sees they are dumb, because other are even more dumber and can mix up the
labels, or leave the ether opened, or throw some dibenzoyl peroxide into the bottle, or god only knows what.
Not so long ago in some colledge there was an explosion of silver nitride that was caused by arbitrary modification of Tollens' reagent - those
assholes made very concentrated solution while being dumb, just like the ones that exploded ether bottle. |
