Ethylene diamine tetraacetic acid (EDTA) is an important complexing agent. EDTA has a wide range of uses. It can be used as bleaching fixer, dyeing aid, fiber treatment aid, cosmetic additive, blood anticoagulant, detergent, stabilizer, synthetic rubber polymerization initiator for the processing of color photosensitive materials. EDTA is a representative material of chelating agent. It can form stable water-soluble complexes with alkali metals, rare earth elements and transition metals. In addition to sodium salt, there are ammonium salt, iron, magnesium, calcium, copper, manganese, zinc, cobalt, aluminum and other salts, which have different uses. In addition, EDTA can also be used to rapidly excrete harmful radioactive metals from the human body to detoxify them. It is also a water treatment agent. EDTA is also an important indicator, but it is used to titrate metal nickel, copper, etc. When used, it should be used together with ammonia to play the role of indicator. 2. EDTA is an excellent chelating agent for calcium and magnesium ions. It is used as a chelating agent for water used in lotion polymerization to remove Ca2+, Mg2+, Fe2+, Fe3+and other metal ions. It is also used as the complexing agent of anaerobic adhesive, that is, EDTA is used to treat the diester of methacrylate to remove the transition metal ions and eliminate the influence that can promote the decomposition of peroxide, which has a very good effect on improving the stability of anaerobic adhesive. EDTA sodium salt chelating metal ions can improve the modification speed of acrylic acid. Storage stability of solid structural adhesive (SGA), dosage - 3 × 10-4～6.0 × 10-4。 When the dosage is 1.5%, the storage stability at 50~C can reach more than 360h (4 days at 50 ℃, equivalent to 1 year at SGA20~C). 3. It is commonly used for softening boiler water quality. Prevent scaling.
Used as dyeing auxiliary, fiber treatment agent, cosmetic additive, blood anticoagulant, water treatment agent, rubber polymerization initiator, PVC heat stabilizer, etc.
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