product detail
powder HEDP 90% 1-Hydroxyethylidene-1,1-diphosphonic acid cas 2809-21-4 Etidronic acid monohydrate Product details: Product Name: powder HEDP 90% Other Names: 1-Hydroxyethylidene-1,1-diphosphonic acid CAS No.: 2809-21-4 Molecular Formula: C2H8O7P2 Appearance: white powder Application: Water Treatment Purity : 90%min Applications: 1.HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. 2.In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; 3.In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. 4.Usually, HEDP is used together with polycarboxylic acid. Item Index Appearance White powder Active content (as HEDP) % ≥ 90 Active content (HEDP.H2O)% ≥ 98 Chloride(as Cl-)% ≤ 5.0 PH（1％ solution） ≤ 2.0 Phosphoric acid(as PO3³‾) ≤ 0.8 Fe ion ppm ≤ 5 Phosphoric acid(as PO4³‾) ≤ 0.5 * In addition：The company could research and develop the new products according to the special demand of our clients．