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What is “EDTA”?

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What is “EDTA”?

(a) Magnesium calcium edentate

(b) Nitrogen phosphorus edentate

(c) Sodium calcium edentate

(d) Magnesium phosphorus edentate

The question was asked by my college director while I was bunking the class.

The query is from Cell Nutrients in section An Overview of Biological Basics & Enzymes of Bioprocess Engineering

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Correct answer is (c) Sodium calcium edentate

The explanation: A specific salt of EDTA, known as sodium calcium edetate, is used to bind metal ions in the practice of chelation therapy, e.g., for treating mercury and lead poisoning. It is used in a similar manner to remove excess iron from the body. EDTA is a chelating agent and a chelating agent is a substance whose molecules can form several bonds to a single metal ion. In other words, a chelating agent is a multidentate ligand.

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