Chemical composition: Silicon dioxide (sio2) 21.00 == aluminium trioxide (al2o3) 5.30 == ferric oxide (fe2o3) 3.30 == calcium oxide (cao) 65.60 == magnesium oxide (mgo) 1.10 == sulphure trioxide (so3) 2.70 == insoluble residue 1.5.0.160 == loss on ignition (loi) 0.90 == dicalcium silicate (c2s) 15.00 == tricalcium aluminate (c3a) 8.05 == tricalcium alumino ferrice (c4af) 9.76 == calcium oxide (k20) 0.690 == nitrate oxide (na2o) 0.400 == iron oxides not to exceed 3.3 = total alkalis 0, 6 maxi. = Packing: In fifty (50) kilo 3 ply kraft paper bags suitable for ocean freight and repacked in jumbo slings of 1.500 kilos.