Degree of substitution ≥ purity %≥ 2% Aqueous viscosity Mpa. s PH value moisture ≤Lv-cmc 0.80 80 10-40 7.0-9.0 10Mv-cmc 0.65 85 300-800 7.0-9.0 10Hv-cmc 0.80 95 800-1200 6.5-8.0 10PAC 0.85 95 1500 6.5-8.0 10