General Question

grumpyfish's avatar

Why does my rock salt smell like a brewery?

Asked by grumpyfish (6657points) January 28th, 2010

I keep a bin of rock salt stocked on the porch for when it snows or ices, so we don’t have to run out and buy salt every time it starts to ice up.

Last time I bought some, it was a different brand, and the stuff was yellow and smelled strongly of malted barley.

I’m guessing one of two things:
(1) The salt is somehow a byproduct of a brewery
(2) There’s some chemical that smells like a brewery that’s on the salt

Anybody know?

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7 Answers

Dog's avatar

I worked in a Microbrewery and one of the components of beer is yeast. Could that be the yellow substance?

If it is I am very curious as to how it got into your salt and if yeast can grow in salt or if it was somehow added to it.

grumpyfish's avatar

@Dog It could be. It’s more likely that the salt is stained yellow (which rocksalt can be naturally).

I homebrew occasionally, and it smells more like malt extract than anything else.

Dog's avatar

Like you I am eager to know what it could be.

Being from a warmer climate we do not use rock salt. Is it sold just for ice purposes or does it serve other functions?

grumpyfish's avatar

This stuff is probably a mixture of NaCl and MgCl, and sold specifically for melting ice on walkways and driveways.

Straight “rocksalt” is sometimes used when making ice cream (makes the ice colder), but the MgCl wouldn’t be included when doing that.

Dog's avatar

Great find! Very interesting.

the_state_of_wisconsin's avatar

maybe brewerys actually smell like rock salt…?

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