nitrite

With the president surrounded by “a fast Hollywood crowd,” someone offered him amyl nitrite, or “poppers.”

Nitrite of ethyl is best made by passing nitrous acid gas into alcohol.

Test the peptone water itself for the presence of indol and nitrite by the addition of pure concentrated H2SO4.

HCl, cooled in ice, and diazotized with sodium nitrite solution, until starch iodide paper showed excess nitrous acid.

If present it is separated with potassium nitrite as described under Cobalt.

Filter off the yellow precipitate of nitrite of potash and cobalt, and wash with a 10 per cent.