... Pb: ≤60ppm Cl: max 100ppm HCl Insoluble matter: ≤0.01% Usage: Mainly used in electric circuit electroplate area. ... substance ≤ ,%0.050.20Cl , % ≤0.020.20SO 4 , % ≤0.050.20water-insoluble , % ≤0.010.10Residue on sieve (150um ) ≤ ,% 0.10Residue on sieve ... (300um ) ,≤ %0.10 Copper Oxide 1317-38-0 ...