... 2.Free sample 3.USP25/BP98 4.purity 99%~101% 5.mesh: 2-4.5-8,8-12,10-20,20-40 WE ... SUPPLY2-4mesh, 4-6mesh, 5-8mesh, 8-12mesh, 10-20mesh, 20-40mesh, 40-80meshAnhydrous and ... .2(H2O)Molecular weight:241.19Appearance:White crystalsAssay:98.0% ~ 101%Water:15.0% max.Ammonium salt:25ppm max.Arsenic salt ...