We are offering oilfield chemicals. 1.drilling additives2.insoluble: 0.5% maximum3.monomer free: 0.05% maximum4.drilling mud additives oilfield chemicals anionic polyacrylamide/apam:1) appearance: white granule2) molecular weight: 5 - 22 million minimum3) granule: 20 - 100 mesh4) solid content: 88% minimum5) hydrolyzing degree: 10 - 20%, 20 - 30% or 30 - 40%6) dissolving time: 2 hours maximum (10c)7) insoluble: 0.5% maximum8) monomer free: 0.05% maximum.