Assay :99.0%min water insoluble:0.01max. Heavy metal:0.001max.Sulphate:0.002max, iron:0.002max.Chloride:0.005max calcium oxide:23.4max, nitrogen:11.76 (calcium nitrate) Assay:98.0%min water insoluble:0.05max, iron:0.001max.Heavy metal:0.002max ph:4.0 25kg net pp/pe bag