Assertion: picric acid | /r/HasProperty | prepared
Facets:
value: from o-nitrophenol
type: OTHER
Source sentences:
text: Picric acid is prepared by dissolving phenol in sulfuric acid and subsequent nitration of the resulting phenoldisulfonic acid with nitric acid or by further nitration of dinitrophenol (prepared from dinitrochlorobenzene).
text: Hence, it has now unexpectedly been determined that picric acid can be prepared from o-nitrophenol and/or p-nitrophenol, insofar as the intermediate compound does not precipitate in the medium of reaction, as, once precipitated, it is no longer possible to nitrate this compound.