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Fun with chemistry

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[Image: hE2C88804]

Mercury(II)thiocyanate on fire - a reaction that used to be known as Pharaoh's serpent. Sold as a firework until they noticed that both the compound and the 'snake' was rather poisonous. One would think that the mercury would have tipped them off...

There is several YouTube videos too, this is one of the best ones I found:

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