30H A poisonous, lemoncoloured, crystalline substance which melts at 122 degrees C. and is largely used in the manufacture of explosives and as a yellow dye for silk and wool. It is prepared by the graduated action of strong nitric acid upon phenol and by the nitration of monochlorobenzol in the presence of sulphuric acid, etc. It explodes with violence when heated or struck, is soluble in alcohol, and sparingly soluble in water, to which it gives a deep yellow colour; meltingpoint, 1220 C.
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