When incubated with catalase/glucose-glucose oxidase, 13C-labeled cyanamide gave rise not only to 13C-labeled cyanide, but also to 13C-labeled CO2. Moreover, a time-dependent formation of nitrite was observed when cyanamide was oxidized in this system. These results suggested that the initial product of cyanamide oxidation, viz. N-hydroxycyanamide, was being further oxidized by catalase/H2O2 to nitrosyl cyanide (O N C N). ...
[Horsewood, Peter; Kirby, Gordon W. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 1587 - 1591]