Nitrosyl chloride, NOC1, is obtained by the direct union of nitric oxide with chlorine; or by distilling a mixture of concentrated nitric and hydrochloric acids, passing the resulting gases into concentrated sulphuric acid and heating the so-formed nitrosyl hydrogen sulphate with dry salt: HN03+3HCl=NOC1+C12 +H 2 O; NOC1 + H2S04 = HCl + NO SO 4 H; NO SO 4 H + NaC1 = Noci+NaHS04 (W.
Ethyl hydrogen sulphate (sulphovinic acid), C2H 5.
There are two medicinal preparations: (1) Acidum sulphuricum dilutum, containing 13.65% of hydrogen sulphate, (2) acidum sulphuricum aromaticum (elixir of vitriol), containing'alcohol, spirit of cinnamon and ginger and 13.8% of hydrogen sulphate.
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