Put it this way. Calcium Carbide is an "interesting chemical". I'd say "gets wet and releases acetylene" is perhaps an eyebrow raiser for COSHH. Putting that in a device that could get blocked may run the risk of having some sort of acetylene grenade.....just hope that if it did go pop, there wasn't a leaky oxygen cylinder in the room, otherwise you'd just get a big smoky flame. There is nothing in the "hazcards" about carbide burning skin, so I assume it doesn't. Dry hands.....
Any half brained person would see that the jet was pricked and enough carbide was used to make the minimal amount of gas. I'd say the shitty old jar of carbide was more of a hazard....assuming leaky oxygen cylinder and lab spod smoking a fag in there.
The oil lamps which are sometimes used instead of bunsens are pretty much molotov cocktails. They are allowed.
Anyway, thankfully, most schools allow a bit of discression.
I built one of these:-
http://en.wikipedia.org/wiki/Rubens '_Tube
and drag it into places with me, it's one of those amazing things that wows people, especially if you put music through it... This place wanted a CORGI Gas certificate for it.
Bearing in mind that it is basically a glorified gas leak.....
Sadly, there are only one group of people that are negatively affected by this crap.
I'll have a word with the chief and ask why the establishment is unusually OTT with simple things. Since it is an oddity and is impinging heavily on teaching/learning compared to other schools, I'd say, short of a denial filled arrogant answer, they would do well to critically appraise the process. If everyone was doing it to the same degree and consistency, there would be no problem.
I expect that regardless of what I say, there will be no change or even introspection over the matter.
And then you wonder why "some kids made a chlorine bomb like the one on the internet" and then blew their fingers off/etc....
I can see that in some cases, the staff are inept and unskilled, but that is no reason to bind everyone by the same bullshit. "Reasonable" is the word I am after. If something awful was to happen, I'd be the first to admit fault and resign/pay the price. I'd rather have this responsibility and be allowed to make my own judgements about what I actually do.
I would say that come the tightening of the economy, this rubbish is the first to get trimmed a bit in practice by the "doing" sector. The public sector will always be full of idealistic, tedious crap, just like the people who work in it! π