This is a very dangerous substance, doesn't really belong in pyro, but since it's too dangerous for Bullshit, and it can make organic substances explode, I'll just post it here. Do NOT try to do this at home, this stuff can burn through your skin in a matter of seconds.

This is one of the most aggressive chemical compounds known (read as: you can make yourself). It's made from 3 parts of concentrated sulfuric acid, and one part 30% hydrogen peroxide. This stuff can destroy HF-proof glass, so I suggest using ordinary glass. You'll have to pour the H2O2 into the acid. Any organic matter that comes in contact with this stuff can explode (alcohol, for instance, but also skin).

You'll need:
-some glass beakers (regular glass, not HF-proof)
-15 ml of 99% H2SO4
-5 ml of 30% H2O2
-an ANORGANIC surface you can place the glass on (don't use wood or plastic)

What to do:
-Place the beakers on the anorganic surface
-Pour the H2SO4 into a beaker
-Wait for a few minutes, then pour the H2O2 in the same beaker as the H2SO4
-Mix it CAREFULLY with a glass stirring rod.

Now you've made piranha solution. Only make this stuff when you have a good, immediate use for it. I used it to examine the effects of various acids, bleaches, and bases on human skin (actually, pork skin, but it's almost similar to human skin).

Now, for safety reasons:

Handling

* Always use glass (preferably Pyrex) containers. Piranha will melt plastics.
* Mix the solution in a hood with the sash between you and the solution. Wear gloves and eye protection.
* When preparing the piranha solution, always add the peroxide to the acid.
* Piranha solution is very energetic and potentially explosive. It is very likely to become hot, more than 100 degrees C. Handle with care.
* Leave the hot piranha solution in an open container until cool.
* Never store piranha solutions. Piranha stored in a closed container will likely explode.
* Adding any acids or bases to piranha or spraying it with water will accelerate the reaction. This includes Photoresist, which is a strong base.
* Mixing hot piranha with organic compounds may cause an explosion. This includes acetone, photoresist, isopropyl alcohol, and nylon
* Aspirate the piranha and dispose via the drain when finished.


Storage

Do not store piranha. Mix fresh solution for each use. Excess solutions should be disposed via the drain, followed by flushing with copious amounts of water.

Disposal

Do not collect for disposal. After the material has cooled, aspirate excess piranha and dispose via the drain, flushing the drain with copious amounts of water.

Quick question, if this stuff eats through plastic then why pour it down the drain? That would melt the plastic components in your drain.

Stuff is only good when its hot. Otherwise its useless.
Try manganese heptoxide. Detonates or burns on contact with anything organic.
Mix sulphuric acid and potassium permanganate. You'll get a green liquid.

yeah it does. What in the drain did the HCl react with?