
1) Explosive chemical
Found on
https://www.crosswordclues.com/clue/diazomethane

Diazomethane is the chemical compound CH2N2, discovered by German chemist Hans von Pechmann in 1894. It is the simplest diazo compound. In the pure form at room temperature, it is an extremely sensitive explosive yellow gas; thus, it is almost universally used as a solution in diethyl ether. The compound is a popular methylating agent in the labor...
Found on
http://en.wikipedia.org/wiki/Diazomethane

(from the article `diazo compound`) The most common diazo compound is diazomethane, a toxic, explosive yellow gas usually prepared as a solution in ether and often used in laboratory ...
Found on
http://www.britannica.com/eb/a-z/d/44

<chemical> Chemical name: Methane, diazo- ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

a yellow, odorless, toxic, explosive gas, CHN, used chiefly as a methylating agent and in organic synthesis.
Found on
https://www.infoplease.com/dictionary/diazomethane
No exact match found.