product list
              CONTACT
              TEL: +86-0632-3671188
              FAX: +86-0632-3671189
              E-mail:??export@krchemical.com
              ADD: No.1, Fuqian South Road, Xuecheng Chemical Industrial Park, Xuecheng District, Zaozhuang City, Shandong Province, China
              HEDP DETAILS

              1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)

              CAS No.  2809-21-4

              Molecular Formula:   C2H8O7P2                Molecular weight: 206.02

              Structural Formula:

              1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

              Properties:

              HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds.It can dissolve the oxidized materials on these metals’ surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250℃. 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/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). 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 solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals. 

              Specification:

              Items Index
              Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
              Active content (HEDP),% 58-62 90.0 min
              Active content (HEDP·H2O),% - 98.0 min
              Phosphorous acid (as PO33-),% 2.0 max 0.8 max
              Phosphoric acid  (asPO43-),% 0.8 max 0.5 max
              Chloride (as Cl-),ppm 100.0 max 100.0max
              pH (1% water solution) 2.0 max 2.0 max
              Density  (20℃)g/cm3 1.43-1.47 -
              Fe,mg/L 20.0 max 10.0 max
              Color APHA (Hazen) 40.0 max -
              Ca Sequestration (mg CaCO3/g) 500.0 min  

              Usage:

              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.. 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; 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 polycarboxylic acid.

              Package and Storage:

              HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.

              HEDP solid: 25kg/bag,customers’ requirement.

              Storage for ten months in room shady and dry place.

              Safety Protection:

              Acidity, Avoid contact with eye and skin, once contacted, flush with water. 

              主站蜘蛛池模板: 久久无码人妻一区二区三区午夜 | 国产日韩综合一区二区性色AV| 国产精品亚洲一区二区麻豆 | 国模私拍福利一区二区| 精品人妻一区二区三区四区| 91国偷自产一区二区三区| 无码少妇一区二区性色AV| 国产一区二区视频在线观看| 亚洲一区二区三区在线播放| 国产av夜夜欢一区二区三区| 国产精品电影一区| 中文字幕一区日韩精品| 国产精品亚洲午夜一区二区三区 | 精品日韩一区二区| 亚洲爆乳精品无码一区二区 | 国产视频一区二区在线播放| 不卡无码人妻一区三区音频| 亚洲美女高清一区二区三区| 男人免费视频一区二区在线观看| 国产成人久久一区二区三区| 国产一区二区三区在线| 国产精品一区二区三区久久| 精品熟人妻一区二区三区四区不卡| 人妻少妇久久中文字幕一区二区| 无码人妻视频一区二区三区| 人妻无码一区二区不卡无码av| 精品国产一区二区三区色欲| 在线日产精品一区| 日韩a无吗一区二区三区| 综合久久久久久中文字幕亚洲国产国产综合一区首 | 亚洲AV无码一区二区三区人 | 久久精品国产一区二区三区| 欧洲精品码一区二区三区| 国产成人一区二区在线不卡| 国模大胆一区二区三区| 国产综合无码一区二区色蜜蜜| 日本无卡码免费一区二区三区| 日韩熟女精品一区二区三区| 国产成人一区二区三区高清| 国产精品一区二区综合| 狠狠爱无码一区二区三区|