HEDP is an organophosphoric acid corrosion inhibitor. It chelate with Fe, Cu, and Zn ions to form stable chelating compounds. It can dissolve the oxidized materials on these metals' surface. HEDP shows excellent scale and conrrosion inhibition effects under temperature 250oC. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid or alkaline and chlorine oxidation tolerance are betterthan that of other organophosphoric acids or salts. HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.
The soild state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as chelating agent in electronic fields and as additives in daily chemicals.
CAS No. 2809-21-4
Molecular Formula: C2H8O7P2
Product Specification / Models
Appearance: white crystal powder
Active content(HEDP)%: 90%min
Phosphorous acid%: 0.5max
Phosphoric acid%: 0.5max
Application / Models
HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in field such as electric power,chemical industry, metallurgy, fertilizer, etc. In light woven industry , HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dyeing-fixing agent. 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. Usually, HEDP is used together with other polycarboxylic acid.
25kg plastic woven bag.
Shandong Huayou Chemistry Co., Ltd is located in Jinan, Shandong province.
The company was founded in 1992 and keep good team work with many colleges and universities and scientific research institutions. In the past 19 years, our company facouses on the newest water treatment chemicals and now we have developed 8 series water treatment over 100 varieties products. At present, our main products are HEDP, ATMP, PBTCA, DTPMPS, PAA, PAAS, HPMA and so on. We can ensure you stable high quality products and supplying with ISO9001:2000 quality management system certificate.
As one of the largest and professional water treatment chemials factories in China, we are always ready to cooperate with all friends and colleagues to be your stable supplier in water treatment area, making a lot of great contribution to water treatment field.