Im. Osadchenko et Ap. Tomilov, ELECTROCHEMICAL SYNTHESIS OF PHOSPHITES FROM HYPOPHOSPHITES, Russian journal of electrochemistry, 33(4), 1997, pp. 452-452
Ammonium phosphite with yields of 98% by substance and 63% by current
is obtained by the ammonium hypophosphite oxidation on the graphite an
ode in a hydrochloric acid medium.