August 23, 2015

Children among 13 injured from Reno Science Museum explosion



There isn't anything funny to say about the methanol explosion from above.

Methanol is a fairly small, organic molecule with one carbon, three hydrogens, and a hydoxyl group (CH3OH.) Because of its small size, methanol has weak intermolecular forces and is highly volatile meaning any liquid supply evaporates very quickly and easily. That combines with its high reactivity with oxygen makes for a marvelously flammable - hence incredibly dangerous - compound.

And it burns almost totally clearly in daylight - as you can see in the below video. This combination - highly flammable, nearly invisible fire - makes it a natural choice for demonstrations involving chemicals that change the color of this 'invisible' fire, flame tests with compounds like boric acid, lithium chloride, potassium chloride, sodium nitrate, etc.

It also makes it a horrible choice for those demonstrations because any open flame hits the methanol vapors which then explode terrifically.

I'll state this. Just about anytime you hear about a lab accident - in a high school or college chemistry class - I'll give you ten to one odds that it's a methanol explosion. Yes, there are other explosive chemicals, but methanol is the common, bad one.

I don't use methanol with fire at all. Nope...not with any open flame in the room in the least.

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