Crystallise the quinone from diethyl ether (charcoal). It distils in steam. It also crystallises from *benzene or aqueous EtOH and sublimes in a vacuum. [Beilstein 7 IV 2422.]
ACUTE/CHRONIC HAZARDS: When heated to decomposition 1,4-Naphthoquinone emits toxic fumes and smoke.
Air & Water Reactions
Insoluble in water.
yellow to green powder
1,4-Naphthoquinone may react with many acids and bases liberating heat and flammable gases (e.g., H2). The heat may be sufficient to start a fire in the unreacted portion of the ketone. May react with reducing agents such as hydrides, alkali metals, and nitrides to produce flammable gas (H2) and heat. Incompatible with isocyanates, aldehydes, cyanides, peroxides, and anhydrides. May react violently with aldehydes, HNO3, HNO3 + H2O2, and HClO4.
Yellow needles or brownish green powder with an odor of benzoquinone.
Flash point data for 1,4-Naphthoquinone are not available; however, 1,4-Naphthoquinone is probably combustible.