1823 16 Nov. 232/2 It is precipitated by protonitrate of mercury.
1908 (Royal Soc.) A. 207 395 Protonitrate of mercury..was made from mercury and nitric acid.
1953 A. G. E. Pearse i. 4 Payen (1843) had already demonstrated nitrogenous substances in vegetable tissues with mercury proto-nitrate.