new scale corrosion inhibitor W-331 (1-Hydroxyethyliden)bis-phosphons?ure, Tetranatrium-Salz Ammoniumethylcarbamoylphosphonat Fonofos (ISO) Dichlorvos sodium 1,1'-diphosphono propionyloxy phosphonate Halofantrin BIS(BETA-CHLOROETHYL)-BETA-CHLOROETHYL PHOSPHONATE 2-Ethylhexylhydrogen-2-ethylhexylphosphonat scale agent QⅠ-105