Re: pirahna solution

Here is how to make the solution. 1) Hood with glass down, googles,
good gloves. If you are using thin latex gloves, double them.
2) Remove all flamables. The mix explodes in contact with acetone and
other solvents. Remove stuff around, there may be some spilling. The
stuff ignites paper, so be carefull with wiping it out. Let the mix
expire overnight before cleaning the spill. Wash the whiping towels
immediately with water to avoid their self-ignition.
3) Use large beaker to avoid overheating and spill because of
foaming-over. Take a large (1L) beaker with conc. H2SO4 150mL. Put the
hood glass down, add 30% H2O2 50 mL INTO the sulfuric acid (I know, but
believe me, this is the right order), mix it by gentle swirling the
beaker. At this point the mix becomes hot and bubbling. Use fresh
immediately. Leave the waste mixture in hood overnight to expire before
diluting it with ice water. Pour it to waster waste after diluting it,
never into organic waste.

We use this mix to clean up dirty fritted filtration funnels. Again,
the glassware must be free of organic solvents to avoid fire or
explosion.

Never make it in larger amounts, never store it but allways use fresh,
never work with it outside hood. If you want to know what would happen
to your face, you can drop a very small bit of paper into the mix and
watch it disappear in a puf of smoke as soon as it hits the mixture.

.

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