Are "What's this mystery substance?" questions considered off-topic?
On another forum I was reading an account of something somebody had produced in a home experiment, and the physical and chemical properties of the substance he described seemed rather bizarre, especially considering the raw materials he claimed to have made it from. Assuming he didn't just make the whole account up (and the account is very detailed and circumstantial, and several other members have managed to replicate part of his results though not all of them), I'm curious to know what are the possibilities for what the stuff could be.