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Some unofficial observers speculated that diazomethane, a gas used in making plastics, might have been spread around in some mysterious way.

In order to make the compound artificially, Winegard had to work with an unstable chemical compound called diazomethane; it is a deadly, odorless yellow gas that can be inhaled without giving a warning sensation of choking.

Diazomethane, CH2N2, was first obtained in 1894 by H. v.

Well-dried hydroxylamine hydrochloride is dissolved in methyl alcohol and mixed with sodium methylate; a solution of methyldichloramine in absolute ether is then added and an ethereal solution of diazomethane distils over.

Diazomethane is a yellow inodorous gas, very poisonous and corrosive.