Page Views: 149 Date Added: 01/04/2009 Last Updated: 01/04/2009 Expiry Date: 12/31/2027 Product/Service Details 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) CAS No.: 2809-21-4 Molecular Formula: C2H8O7P2 Molecular weight: 206.02 Structural Formula: 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 Colorless or light yellow transparent liquid White crystal powder Active content（HEDP）％ 58.0-62.0 89.0 min Phosphorous acid（as PO33-）% 2.0 max 0.5 max Phosphoric acid （asPO43- ）% 0.8 max 0.5 max Chloride (as Cl-)% 0.01 max 0.01 max pH（1％ solution） 2 max 2 max Density （20℃）g/cm3 1.40 — Fe ion ppm 10 max 20 max Colour APHA (Hazen) 40 max — 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: Normally In 250kg net Plastic Drum, IBC drum can also be used as required HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in room shady and dry place. Safety Protection: Acidity, Avoid contact with eye and skin, once contacted, flush with water.

Company Information (Qingdao IRO TAIHE International Trade Co., Ltd)

Company Profile: Qingdao IRO TAIHE International Trade Co., Ltd. was a branch company of Shandong Taihe Water Treatment Co., Ltd., which is one of the biggest manufacturers of water treatment chemicals in China. The youthful company is formed on the basis of the mother company, utilizing its advantages on the water treatment field, congregating other chemical products, and devoted to building the trade bridge between you and China. Although this is a young company, we stand on the higher position of leading manufacturer of water treatment chemicals, with more than ten years rich experience. We know clearly about the Chinese water treatment field, have close communication with many Chinese suppliers of other chemicals and can provide you products with high stable quality and competitive price. Our main export products: water treatment chemicals, water purification and wastewater treatment, pharmaceutical intermediates, food additives, agrochemicals, and other fine chemicals, etc. We have confidence to be your ideal business partner in China. If some products are to your interests on our product list, please do not hesitate to contact us. You will receive our prompt attention. If the products you required are not on the list, please also contact us, we'll try our best to find related suppliers for you. We have strong back support, and will find the stable supplier for you through our strong purchasing department and relation net, if it is needed, we can do spot inspection and analyze products to make sure the quality stable. To be bridge between YOU and China.. >> More Website URL: http://www.bridgat.com/u1355