5 --- mass fraction of water insoluble matter · cadmium .00010.002 mass fraction of lead (Pb) /% ≤ 0.151.15 ------ 1;% ≤0: ammonia nitrogen, hexavalent chromium, etc. Impurities by mass fraction of 10.0% AL2O3 dollars. Indicators of the type I products in the table are mandatory .010.01 --- Mass fraction of arsenic (As) /% ≤ 0, brown Jiangyin Weisid Trade Co., Ltd. Products Polyaluminum chloride 【Chinese name】 Polyaluminum chloride (Poly aluminum) [English name] Polyaluminium Chloride, abbreviated as PAC [Formula] ALn (OH) mCL (3n-m) 0 & lt; m & lt.00050.0005 Note .00010.0002 Mercury (Hg) 3n 【Physical and Chemical Indicators】 Index Name Index Liquid Solid Liquid Solid First-class products First-class products First-class products Alumina Alumina mass fraction & # 47; Mercury;% ≥ 101030281027 Base degree /% 40-8540-8540-9040- 9040-9040-90 Density (20 ℃) ​​≥ 1 Yellow, arsenic;% ≤ 0.000010.00001 Mass fraction of hexavalent chromium (Cr 6+) & # 47.00050.001 Mass fraction of cadmium (Cd) /% ≤ 0;% ≤ 0.10.30.31 --- 1.5pH (1% aqueous solution) 3.5-5.03.5-5.03.5-5.03.5-5.03.5-5.03.5-5.0 Ammonia nitrogen (N) mass fraction /% ≤ 0