Ethylenediaminetetraacetic acid (EDTA) CAS 60-00-4
EDTA is one of the most well-known and widely used reagents for metal ion complexation. Its application ranges from the treatment of poisoning with heavy metals to use in analytical methods of water quality control, as well as in metallurgy and purification of process fluids.
Chemical structure and synthesis
The molecular formula of EDTA:
C10H16N2O8
Synthesis:
EDTA is produced by sequential alkylation of ethylenediamine with chloroacetic acid or its corresponding derivatives under alkaline conditions, followed by purification of the product.
Physico-chemical properties
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Solubility: High solubility in water due to the presence of several carboxyl groups.
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Complexing ability: It has six coordinated donor atoms (two nitrogen atoms and four COOH groups), which ensures the formation of strong complexes with ions of most metals.
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pH dependence: EDTA is active in a wide pH range, which allows it to be used in various technological processes.
Application
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Medicine: It is used to treat poisoning with heavy metals (for example, lead poisoning).
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Water treatment: It is used for binding and subsequent removal of dissolved metal ions from water.
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Industrial production and analytical chemistry: It is included in the composition of reagents for complexometric titrations and is used to correct the composition of technological solutions.
Conclusion
EDTA is a universal complexing agent that, due to its high efficiency and versatility, finds application in various fields of science and technology. Its use makes it possible to ensure the stability and control of chemical processes in medicine, ecology and industrial production.
