... ,3N,4N, 5N, 6N, 7N purity grade) and indium products.Our company specializes in producing indium ingot(in 2N,3N,4N, 5N, 6N ... , 7N purity grade) and indium products.Indium ingot:Chemical contents :In 98-99%In 99.99%In ... mainly used in ITO film, solder in electronic industry, sealing element in low temperature and vacuum area, solubility anode and nuclear reactor control ...