Bo Ruite Zhejiang edetate disodium EDTA-2Na prices manufacturers

Edetate disodium (EDTA disodium) English name: EDTA-2Na (Ethylenediaminetetraacetic acid disodium salt) of the formula:? C10H14N2O8Na2 2H2O Molecular Weight: M = 372.24 CAS Number: 6381-92-6 Properties: white crystalline powder. Dissolved in water, with a variety of metal ion chelation. Test items Standard Index Content% ≥99.0 Chloride (Cl dollars)% ≤ 0.01 Sulfate (SO4 dollars)% ≤ 0.05 Heavy metals (as Pb)% ≤ 0.001 iron (as Fe)% ≤ 0.001 chelation values: mgCaCO3 / g ≥ 265 PH value 4.0-5.0 NTA% ≤ 1.0 Bulk density kg / m3 850-1050 Clarity test Qualified Appearance: white crystalline powder Packing: 25kg / bag or according to customer requirements for packaging. Role of EDTA: 2.1 boiler water softening detergent in recent years in addition to cation exchange resin method, it is that the application masking agent to harmful metal ions to form stable water-soluble chelates. Such as the use of untreated hard water in the boiler or evaporator, the inner layer often calcium or iron compounds to produce boiler scale available at this time, disodium EDTA, EDTA tetrasodium and a small amount (determined by scale formation component) on the iron Strong chelating ability of gluconic acid, citric acid, triethanolamine mixture as detergents. 2.2 Chemical analysis of EDTA titration is commonly used chemical analysis methods, a direct titration, indirect titration, back titration and displacement titration. Total hardness of water can be used to measure a variety of metal ions in solution content. EDTA titration has less sample, simple, convenient, saving advantages reagents. 2.3 synthetic detergent synthetic detergent although the impact from hard water, but a small amount of EDTA added to mask metal ions, can increase the stability of the surfactant, and the foam generating enhance detergency of detergents, foaming power, emulsifying power and penetration force, help to improve the cleaning efficiency. EDTA is also used bar soap and liquid soap. 2.4 textile industry textile industry raw materials such as cotton, rayon or wool, often trace metal ions, a great impact on product quality, thus masking agents such as EDTA has been widely used in textile operations. Such as the initial wash with soap or detergent fiber surface wax or grease, adding a small amount polyphosphates, hydroxy acid or EDTA and other masking agents soften water can prevent calcium and magnesium soap soap fabric dyed dark spots or not They are inadequate. 2.5 metal to remove rust and although the solution to a plating metal and alloy surface oxide can be immersed in a strong acid, but because the metal oxide formation, the surface can lose toughness, so the use of masking agents to go in a slightly acidic or alkaline medium rust more favorable. EDTA as a masking agent in the plating process is mainly to control the concentration of metal ions to maintain a balance with a bit of metal ions in the electroplating process, so as to stabilize the bath. Furthermore, the addition of EDTA in the trivalent chromium plating solution with trivalent chromium ions to form an active complex ions accelerate electrodeposition speed, while suppressing Cr3 + hydroxyl bridge reaction, the plating can continue to be, to get a good performance thick chrome coating. 2.6 Rubber Rubber and rubber polymer latex flowing through the catalytic trace metal ions can generate an acid, condensing the same natural causes, it must be added to make pH 0.5% ammonia in 11 to 13:00, in order to maintain stable for a long time. EDTA was added as masking harmful metal ions, metal ion to form a buffer system, i.e., can inhibit the catalytic reaction. 2.7 animal and vegetable oils and edible vegetable oil can cause catalytic metal ions are oxidized deterioration. Washing citric acid, tartaric acid, EDTA, NTA, etc. solution several times to remove the metal ions, i.e., can stop oxidation, to stabilize. EDTA 2.8 Preparation of the gelling agent material is a good, stable in alkaline solution in the presence of metal ions to form chelates with most. With EDTA complexing sol-gel method, by solvent evaporation to promote the solution was sticky like, so close to each other and to chelate molecular hydrogen bonds form a sol, functional nano materials can be prepared. 2.9 applied to other aspects of the application of medical blood anticoagulant, the blood can form chelates calcium ions, calcium ions lose clotting effect, which prevents blood clotting. Clinically for the treatment of lead, mercury and radioactive poisoning; the food industry as a food additive, and prevent the presence of trace metal ions which cause food discoloration; EDTA chelation develop organic fertilizer in agriculture, enhance inter-trace elements beneficial synergies, improve biological activity, easily absorbed by plants; daily chemical industry, anti-corrosion additive EDTA is used in cosmetics, reducing the catalytic oxidation of metal ions on the oil, preventing rancidity. In addition the glass surface pretreated with EDTA glass decoration can improve brightness, add calcium EDTA and EDTA aluminum in batteries to extend battery life.