On Sat, 07 Nov 2015 21:01:57 -0700, rbowman
wrote:

On 11/07/2015 06:09 PM, Ed Pawlowski wrote:
Only place I know of is ABCO welding supply and a place that supplies i
mostly for pharmaceutical. Never saw it in a supermarket but I've heard
of it.

Rosauer's Supermarket has it here. Every now and then I'll see someone
buying some but I have no idea what for.

My son buys it sometimes for cooling a CPU. But he prefers liquid
nitrogen.