In order to check a recently suggested interaction between high energy electrons from radioactive β-decay and organic molecules dissolved in water, crystallization of D, L-sodium-ammonium tartrate was studied in the presence of32P. The results substantiate the existence of such an interaction. Irradiated samples yielded more crystalline material than controls, the relative difference was 20.5%. The possible interference of contaminations as well as the relation of these findings to the role of radioactive β-decay in chemical evolution is discussed.