hydrogenchloride byproducts: H2O; a mixt. of 5 parts cryst. SnCl2, 10 parts aq. HCl (D=1.21) and 0.9 parts aq. HNO3 (D=1.38) is heated; after a first vigorous evolution of gas N2O forms in a steady reaction; Ratio of components must be carefully checked, danger of explosion;;
