Picric-acid sentence example

picric-acid
  • The residue is dissolved in alcohol and to the cold saturated solution a cold alcoholic solution of picric acid is added.
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  • We may also notice the conversion of picric acid.
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  • On boiling with concentrated nitric acid it yields picric acid.
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  • 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.
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  • 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).
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  • It forms a crystalline compound with picric acid.
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  • Alkaline potassium ferricyanide oxidizes it to picric acid.
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  • The chief application of picric acid and its salts is in the manufacture of explosives.
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  • When ignited, picric acid burns quietly with a smoky flame.
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  • 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.
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  • 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.
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  • 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.
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