# Forgotten Chemical Reaction

**URL:** <https://boards.straightdope.com/t/forgotten-chemical-reaction/611753>\
**Category:** Factual Questions\
**Created:** [February 4, 2012, 1:47pm UTC](https://boards.straightdope.com/t/forgotten-chemical-reaction/611753 "2012-02-04T13:47:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Deflagration](https://avatars.discourse-cdn.com/v4/letter/d/3ab097/32.png) [@Deflagration](https://boards.straightdope.com/u/Deflagration)\
**Post date:** [February 4, 2012, 1:47pm UTC](https://boards.straightdope.com/t/forgotten-chemical-reaction/611753/1 "2012-02-04T13:47:49Z")

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I’m trying to remember the following chemical reaction.

[![](https://www.damnlol.com/pics/576/d2cc4c836cf00785dfbae5da03a0a16f.gif) ](https://www.damnlol.com/pics/576/d2cc4c836cf00785dfbae5da03a0a16f.gif)

Does anyone know what it is?

Thanks

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**Author:** ![Zany\_Zeolite\_Zipper](https://avatars.discourse-cdn.com/v4/letter/z/4af34b/32.png) [@Zany\_Zeolite\_Zipper](https://boards.straightdope.com/u/Zany_Zeolite_Zipper)\
**Post date:** [February 4, 2012, 1:51pm UTC](https://boards.straightdope.com/t/forgotten-chemical-reaction/611753/2 "2012-02-04T13:51:26Z")

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Mercury Thiocyanate: [https://www.youtube.com/watch?v=dX7xeF-ywxc](https://www.youtube.com/watch?v=dX7xeF-ywxc)

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**Author:** ![Zany\_Zeolite\_Zipper](https://avatars.discourse-cdn.com/v4/letter/z/4af34b/32.png) [@Zany\_Zeolite\_Zipper](https://boards.straightdope.com/u/Zany_Zeolite_Zipper)\
**Post date:** [February 4, 2012, 1:54pm UTC](https://boards.straightdope.com/t/forgotten-chemical-reaction/611753/3 "2012-02-04T13:54:13Z")

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Or did you want the formula:[http://chemistry.about.com/b/2011/05/12/pharoahs-snake-firework-or-chemistry-demonstration.htm](http://chemistry.about.com/b/2011/05/12/pharoahs-snake-firework-or-chemistry-demonstration.htm)

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**Author:** ![Deflagration](https://avatars.discourse-cdn.com/v4/letter/d/3ab097/32.png) [@Deflagration](https://boards.straightdope.com/u/Deflagration)\
**Post date:** [February 4, 2012, 3:03pm UTC](https://boards.straightdope.com/t/forgotten-chemical-reaction/611753/4 "2012-02-04T15:03:02Z")

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Excellent, That’s it.

Thank you.