Ethylenediaminetetraacetic acid (EDTA) CAS 60-00-4 is an organic compound with the chemical formula C10H16N2O8. It is a white powder at room temperature and pressure. It is a chelating agent that can bind with divalent metal ions such as Mg2+, Ca2+, Mn2+, Fe2+, etc. Due to the fact that most nucleases and some proteases require Mg2+for their action, they are commonly used as inhibitors of nucleases and proteases; It can also be used to remove the inhibitory effect of heavy metal ions on enzymes.

Chinese name: ethylenediaminetetraacetic acid

Foreign name: Ethylene Diamine Tetraacetic Acid; (EDTA)

Nickname: edeic acid

Chemical formula: C10H16N2O8

Molecular weight: 292.24

CAS login number: 60-00-4

EINECS login number: 200-449-4

Melting point: 250 ℃

Boiling point: 614.2 ℃

Water solubility: 0.5g/L (25 ℃)

Density: approximately 1.6 g/cm ³

Appearance: White powder

Flash point: 325.2 ℃

Physical and chemical properties

White odorless, odorless, colorless crystalline powder with a melting point of 250 ℃ (decomposition). Insoluble in ethanol and general organic solvents, slightly soluble in cold water, soluble in aqueous solutions of sodium hydroxide, sodium carbonate, and ammonia. It can be soluble in over 5% of inorganic acids, as well as in ammonia water and 160 parts of boiling water. Its alkali metal salts are soluble in water.

Purpose

EDTA is an important complexing agent. EDTA has a wide range of applications and can be used as a bleaching and fixing agent for color sensitive material processing, dyeing aid, fiber treatment aid, cosmetic additive, blood anticoagulant, detergent, stabilizer, synthetic rubber polymerization initiator. EDTA is a representative substance of chelating agents. It can form stable water-soluble complexes with alkaline earth metals, rare earth elements, and transition metals. In addition to sodium salts, there are also ammonium salts and various salts such as iron, magnesium, calcium, copper, manganese, zinc, cobalt, aluminum, etc. These salts have different uses. In addition, EDTA can also be used to detoxify harmful radioactive metals by rapidly excreting them from the human body. It is also a water treatment agent. EDTA is still an important indicator, but it is used to titrate metals such as nickel and copper. When used, it must be used together with ammonia to act as an indicator.

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