Dangerous Chemicals

This one is too good to pass up. 

Beware the dangers of Dihydrogen Monoxide!  Sounds dangerous doesn't it, just like its cousin Carbon Monoxide, or Hydrogen Sulphide, Hydrogen Cyanide, and Carbon Tetra-Hydrogen?  Dihydrogen Monoxide is colorless, odourless, and tasteless and results in thousands of deaths every year.  There are so many perils associated with this substance that one is advised to stay as far away as possible from it. 

However, the kicker is that unlike the other chemicals listed here:

CO

H₂S

HCN

CH₄

Dihydrogen Monoxide is actually:

H₂0

Or Water.