Sciencemadness Discussion Board

How to store methyl iodide

Triflic Acid - 15-3-2021 at 10:51

The forum has a bunch on things about making methyl iodide, but practically nothing about storing it. I'm working in a garage that has about as much climate control as a hole in a tree, and I don't have a working fridge or anything for my lab. Would just wrapping the bottle in Al foil to keep the light out, storing it under copper, and wrapping the glass threads of the bottle in teflon tape be enough? I don't think I'm going to use the MeI for some time, so this is going to be >1 month storage. How should I try storing this?

DraconicAcid - 15-3-2021 at 11:01

Don't make it until you're ready to use it. Or wait until winter.

Triflic Acid - 15-3-2021 at 11:12

Right now, it's still pretty cold here, with highs in the 50s or 60s (F, not C :P).

Texium - 15-3-2021 at 11:17

I stored my homemade stuff in my freezer in an amber glass bottle containing a piece of clean copper wire. The bottle had a standard rubber seal and seemed to contain it just fine. In the lab I worked in, it was stored in the fridge in its original bottle from Sigma and I never noticed any evaporation of it in there either.

So if you have a bottle with a really good seal, fridge is probably fine. I wouldn't want to store it any warmer though, cause even if the bottle can contain it, it would become pressurized, and you'd just be asking for a sudden burst of toxic vapors whenever you open it.

Triflic Acid - 15-3-2021 at 11:22

Ok, in that case, I'll use the MeI within a few days (< 1 week) for the first step in an ionic liquid synth (shown below), or destroy it. I'm making the MeI to test a new method of production, more details here:

IonicLiquid.png - 84kB

outer_limits - 15-3-2021 at 11:31

If you can dig a hole you can make an underground storage. In the place where I live the temperature 2 meters below the ground is up to 14 deg C. Air temp in summer is even up to 40 deg C.

I have some bromoethane in GL45 bottle with red PBT-lined cap. During summer it was in a place where the temperature was nearly reaching it's boiling point. No leaks. When I opened it once I've noticed some hissing but I I didn't lost almost anything which I checked by weight of the flask.

Triflic Acid - 15-3-2021 at 11:58

First the neighbors heard a blower fan coming from the garage, then they see me burying something in the backyard :P Not at all suspicious.