The solubility of cyanazine in water (1) and ethanol (2) has been determined over the temperature range 10-30 degrees C and the whole range of solvent water mass fractions W-1 = 0.0-1.0, and the densities of the resulting saturated solutions have also been measured. At each temperature, the solubility of cyanazine increases with increasing mole fraction x(2) of ethanol up to a local maximum at x(2) similar or equal to 0.9. The density of saturated aqueous ethanol solutions of cyanazine decreases with increasing ethanol content over the whole range. The solubility of cyanazine in aqueous ethanol at each temperature is correlated by polynomial (W-1 = 0.3-1.0) and exponential (W-1 = 0.0-0.4) expressions while the density results are fitted to an exponential expression.