In(OH)3 (%) 99.995min Al 5 ppm max, Ca 5ppm max, Cd 5 ppm max, Cr 5ppm max, Ti 5ppm max, Cu 5ppm max, Fe 8 ppm max, Pb 15ppm max, Ni 5ppm max, Sn 5ppm max, As 2ppm max, Co 15ppm max, Mg 5ppm max. Particle size: 0.5~2 um.