... 3.packing will according to clients request 4.modulus:3.0-3.5 Purpose:Used in quantity in paper-making and ... blocks or granules.Specification: ITEMIndexOne Sort 12345Density35.0-37.039.0-41.044.0-46.039.0-41.050.0-52.0Sodium oxide (Na2O),% >7.08 ... .42.6-2.92.2-2.52.2-2.5Fe ,% <0.02Insolubles In water,% <0.2 Sodium Silicate S3 ...