... .100% water soluble and use for irrigation 2.50% K2O,18%S 3.Suit for the plant ... 50Molecular Formula:K2SO4,Molecular Weight: 174.27Appearance: white granularK2O: 50% min,Cl: 0.5%max ,Moisture:0.5%max ... PE bag, 21MTs/20'FCL SOP powder 0-0-50 Molecular Formula:K2SO4, Molecular Weight: 174.27,Appearance: ... white powder,K2O: 50% min.Cl: 0.5% max. Sulphur 18% min ...