Picric-acid Sentence Examples

The residue is dissolved in alcohol and to the cold saturated solution a cold alcoholic solution of picric acid is added.

We may also notice the conversion of picric acid.

On boiling with concentrated nitric acid it yields picric acid.

The products of the action of nitric acid on cellulose are not nitro compounds in the sense that picric acid is, but are nitrates or nitric esters.

Hot concentrated nitric acid oxidizes it to picric acid and oxalic acid, whilst on treatment with hydrochloric acid and potassium chlorate it yields chloranil (tetrachloroquinone).

It forms a crystalline compound with picric acid.

Alkaline potassium ferricyanide oxidizes it to picric acid.

The chief application of picric acid and its salts is in the manufacture of explosives.

When ignited, picric acid burns quietly with a smoky flame.

The more important picric powders are melinite, believed to be a mixture of fused picric acid and gun-cotton; lyddite, the British service explosive, and shimose, the Japanese powder, both supposed to be identical with the original melinite; Brugere's powder, a mixture of 54 parts of ammonium picrate and 45 parts of saltpetre; Designolle's powder, composed of potassium picrate, saltpetre and charcoal; and emmensite, invented by Stephen Emmens, of the United States.

This holds for benzene and phenol, and is supported by the observations of Gossner on [1.3.5] trinitrobenzene and picric acid (1.3.5-trinitro, 2 oxybenzene); these last two substances assume rhombic forms, and picric acid differs from trinitrobenzene in having w considerably greater, with x and slightly less.

Phosphorus pentachloride converts it into picryl chloride, C 6 H 2 C1(NO 2) 3, which is a true acid chloride, being decomposed by water with the regeneration of picric acid and the formation of hydrochloric acid; with ammonia it yields picramide, C 6 H 2 NH 2 (NO 2) 3.