P 2945 (OTTO) Praseodymium(III) nitrate, hexahydrate, 99.99% Cas 15878-77-0 - used in fluorescent display tubes and phosphors. It is also used in the ultrasonic synthesis of phase-pure praseodymium molybdate. It plays a major role in the solvothermal process for formation of doped lanthanide oxysulfide.