NAME FORMULAMOLECULAR WEIGHTCAS No.TYPICALPURITYAVAILABILITYZinc SulfideZnS97.4131-98-399.99%Sintered Tablets,CVD ChunkOpto Physical Properties DENSITY REFRECTIVE INDEX TRANSPARENCY RANGE MELTING POINT 4.09g/cm3 2.3 at 500nm 400nm 14000nm 28300C Typical Element Analysis (in ppm) 99.99% Fe<10 Pb<4 Al<8 Cu<2 Ag<1 Mg<3 As<5 Mn<1 Sb<5 Bi<5 Si<15