For more information Use: Plant inhibitor content: 50 Model: HEDP chemical composition: HEDP Etidronic acid Brand: Kerry Chemical Type: Corrosion Inhibitor Appearance: colorless substance content or pale yellow liquid: 50 PH value range: ≤2.0 reference dosage: 1 ~ 10mg / L CAS: 2809-21-4 Etidronic acid HEDP 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) Alias: hydroxy ethylene bis phosphonate, HEDPA, (1- hydroxyethylidene) diphosphonic acid, 1-hydroxy-1,1-diphosphate CAS No. 2809-21-4 Molecular C2H8O7P2 relative molecular mass: 206.02 a, Properties and Uses : HEDP is an organic phosphonic acid corrosion inhibitor, with iron, copper, zinc and other metal ions to form stable complexes, can dissolve metal oxide surfaces. At 250 ℃ can still play a good role in corrosion and scale, at high pH remains stable, hard to be hydrolyzed, under normal light and heat conditions difficult to break down. Acid and alkali resistance, resistance to chlorine oxidation than other organic acid (salt). With metal ions in water, especially calcium ions to form six-ring chelates, which scale with better effects and obvious dissolution threshold effects. When, and other water treatment chemicals, it shows good synergistic effect . HEDP solid belong to high-purity products for cold areas in winter; especially for electronic industry, daily chemical cleaning agents and additives. The products are widely used in electric power, chemical industry, metallurgy, fertilizer and other industrial cooling water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor; in the textile industry, can be used for metal and non-metal cleaning agent peroxide stabilizer and dye-fixing agent dyeing industry, non-cyanide electroplating complexing agent, the pharmaceutical industry as carrying radioactive agents. Second, the technical indicators in line with HG / T 3537-1999 Item Index Appearance colorless or light yellow transparent liquid white powder Active content (HEDP dollars)% ≥ 50.0 60.0 89.0 phosphite (as PO33- dollars)% ≤ 2.0 2.0 0.80 phosphate (PO43- counted in)% ≤ 0.8 0.8 0.50 Chloride (Cl- dollars)% ≤ 0.01 0.01 0.01 pH value (1% solution) ≤ 2.0 2.0 2.0 Density (20 ℃) ??g / cm3 ≥ 1.34 1.40 - Calcium chelation value mg / g ≥ 450 500 - iron (as Fe2 +) content mg ??/ L ≤ 10 10 5.0 Active component (HEDP · H2O to count)% ≥ - 98.0 Third, to use as a scale inhibitor HEDP Commonly used concentration of 1 ~ 10mg / L, as a general inhibitor concentration 10-50mg / L; as cleaning agents are generally used at a concentration 1000 ~ 2000mg / L; usually the polycarboxylic acid type scale with the use of dispersants. When other industries, the amount should be determined according to the test. Fourth, packaging and storage HEDP liquid plastic barrel, 30Kg or 250Kg; HEDP solid polyethylene bag lined plastic woven bag, net weight 25kg, can be determined according to the user. Stored in a cool indoor ventilation, moisture, storage for ten months. Fifth, the security of the product is acidic, attention to labor protection, should avoid contact with skin and eyes, rinse immediately after contact with water.