Specification :
Hydroxy-ethylidene diphosphonic acid, HEDP 1-Hydroxy Ethylidene-1 ,1-Diphosphonic Acid ¡¾CAS¡¿ 2809-21-4 Synonym: Fork-Hydroxy B-diphosphonic acid Dequest 2010 Molecular Formula C2H8O7P2 Molecular Weight: 206.02 Structural formula: 1, product performance This product is an organic phosphonic acid scale and corrosion inhibitor, with iron, copper, zinc and other metal ions to form a stable complex, can dissolve the metal surface oxides. Under 250 ¡æ still play a good role in corrosion and scale inhibitors in high pH, is still under the stable, not easily hydrolyzed, generally easy to decompose under the conditions of light and heat. Acid and alkali resistance, other than chlorine oxidation of organic phosphonic acid (salt) well. With water and metal ions, especially calcium ions to form chelate ring 6, thus a good scale inhibition effects and obvious dissolution with limited effect, when the compound used and other water treatment agents has shown good synergy . Second, quality indicators in line with HG / T 3537-1999 items index Appearance Colorless or light yellow transparent liquid Active component (HEDP)% ¡à 50.0 60.0 Phosphorous acid (as PO33-count)% ¡à 2.0 2.0 phosphoric acid (as PO43 - count)% ¡à 0.8 0.8 Chloride (as Cl-count)% ¡à 1.0 1.0 PH value (1% aqueous solution) ¡à 2 2 Density (20 ¡æ) g/cm3 ¡à 1.34 1.40 Calcium chelation value mg / g ¡à 450 500 iron ion ppm ¡à 10 10 3, the application scope and use of this product is widely used in electric power, chemical industry, metallurgy, fertilizer and other industrial cooling water system and in the low-pressure boiler, oil field and pipeline water scale and corrosion inhibition; in textile industry, can be used for metal and non-metallic cleaning agents, bleaching and dyeing industry, peroxide stabilizer and dye-fixing agent, non-cyanide electroplating industry complexing agent. For general use of the concentration of inhibitor 1 ~ 10mg / L, as the concentration of corrosion inhibitor general use of 10-50mg / L; for general use cleaning agent concentration of 1000 ~ 2000mg / L; usually associated with polycarboxylic acid type dispersant used in conjunction with scale . 4, packaging and storage plastic barrel, 30Kg or 250Kg, can also be determined according to user needs. Stored indoors in the shade, storage period of ten months. 5, security protection: This product is acidic should be avoided with the eyes, skin contact, when splashed on the body, rinse immediately with plenty of water.
