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Ammonium thiocyanate, 5% (0.7 M) solution.  It is a traditional and still relatively popular recreational drug among Lemkos. Here's the best image I could find to explain the addition of the dipole vectors^. The autoignition temperature of diethyl ether is 160 °C (320 °F).  Diethyl ether was found to have undesirable side effects, such as post-anesthetic nausea and vomiting. , Another reaction that can be used for the preparation of ethers is the Williamson ether synthesis, in which an alkoxide (produced by dissolving an alkali metal in the alcohol to be used) performs a nucleophilic substitution upon an alkyl halide.  British doctors were aware of the anesthetic properties of ether as early as 1840 where it was widely prescribed in conjunction with opium. Halothane was the first such anesthetic developed and other currently used inhaled anesthetics, such as isoflurane, desflurane, and sevoflurane, are halogenated ethers. As a drug, it has been known to cause psychological dependence, sometimes referred to as etheromania. , Diethyl ether is extremely flammable and may form explosive vapour/air mixtures.
Add 6 ml of conc. Shake the commercial preparation with 2% ammonium ferrous sulphate solution in 2 M H2SO4 and then distil. It has limited solubility in water (6.05 g/100 ml at 25 °C) and dissolves 1.5 g/100 g (1.0 g/100 ml) water at 25 °C. Along with the rare-earth elements. Storage over sodium hydroxide precipitates the intermediate ether hydroperoxides. , Since ether is heavier than air it can collect low to the ground and the vapour may travel considerable distances to ignition sources, which does not need to be an open flame, but may be a hot plate, steam pipe, heater etc. Modern anesthetic agents reduce these side effects. Diethyl ether is a common laboratory aprotic solvent. One advantage is a well-defined margin between therapeutic and toxic doses, which means one would lose consciousness before dangerous levels of dissolved ether in blood would be reached.