ABSTRACT The kinetics of the reactions between sodium nitrite and phenol or m-, o-, or p- cresol in potassium hydrogen phthalate buffers of pH 2.5–5.7 were determined by integration of the monitored absorbance of the C-nitroso reaction products. At pH 3, the dominant reaction was C-nitrosation through a mechanism that appears to consist of a diffusion-controlled attack on the nitrosatable substrate by NO/NO2H2 ions followed by a ...