... timely delivery 2.top-class quality 3.professional R&D 4.satisfied after-sales service PAC :CARBOXYMETHYL ... Petroleum grade Product features: 1, high degree of substitution, good uniformity of substitution . 2, high transparency, viscosity and water loss ... drilling of oil . Petroleum grade Product: PAC-LV, PAC-R, CMC-LV, CMC-HV CMC PAC LV 95% ParameterQuality ... Loss(ml) ≤87.6 Polyanionic Cellulose HV/LV/R