On Tue, 16 Oct 2018, RussellMc wrote: > Acetylene is uniquely dangerous in its abilities to self decompose, ignit= e > from static electricity generated by it's discharge from an eg welding ti= p, > and propagate explosive waves at pressures well below the pressure at whi= ch > it will deflagrate. To be stressed: acetylene does not need oxygen or air to explode.=20 Acetylene has a triple carbon-carbon bond which is NOT very stable. It=20 will detonate given a resonably small mechanical shock. The term "self=20 decompose" does not do the reaction justice - think more along the lines=20 of nitro! The only saving grace in all these "experiments" has been the=20 small mass of acetylene involved. Regards Sergio --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .