Tetrasodium EDTA is a salt obtained by neutralizing ethylenediaminetetraacetic acid with four equivalents of sodium hydroxide (or equivalent of sodium alkali). It is a white solid that is highly soluble in water. Commercial samples are usually hydrated, such as Na4EDTA.4H2O. The properties of the solutions produced from the anhydrous and hydrated forms are the same as long as they have the same pH value.
It is used as a source of the chelating agent EDTAb. The pH value of a 1% aqueous solution is approximately 11.3. When dissolved in neutral water, it is partially converted to H2EDTA2-. Ethylenediaminetetraacetic acid is produced commercially from tetrasodium EDTA.
product
This substance is also known as Dissolvine E-39. It is edetate. It has been known since at least 1954. Sometimes used as a chelating agent.
The assignee of 5% of USPTO patents containing this substance is Procter & Gamble. It is mainly used in cosmetics, hair care and skin care products.
The substance has been used to formulate products to help remove rust, corrosion and scale from ferrous metals, copper, brass and other surfaces.
It is present in a 6% concentration and is the main active ingredient in some types of engine cooling system flushants.
