What is the melting point of EDTA

Tetrasodium ethylenediaminetetraacetate



Structural formula
(NaOCOCH2)2NCH2CH2N (CH2COONa)2
General
Surname Tetrasodium ethylenediaminetetraacetate
other names

EDTA tetrasodium salt (dihydrate)

Molecular formula C.10H12N2N / A4O8
CAS number 64-02-8 (10378-23-1 dihydrates)
Brief description White dust
properties
Molar mass 380.2 (416.23 dihydrate) gmol−1
density 0.71 g cm−3
Melting point > 300 ° C
boiling point > 400 ° C (decomposition)
solubility

easily soluble in water

safety instructions
LD50

3030 mg kg−1 (oral, rat)

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions.

Tetrasodium ethylenediaminetetraacetate is the sodium salt of EDTA and an intermediate product in the manufacture of various substances. It also acts as a pesticide and is also used as a grease remover, i.e. as a detergent.

Extraction and presentation

It is obtained by the cyanomethylation of ethylenediamine with sodium cyanide and formaldehyde.

use

EDTA is used as an intermediate product and complexing agent for various syntheses (photo chemicals, chemical products, household chemicals, waxes, cosmetics). It also works as a degreaser and is used as a detergent. In 1999 almost 35,000 tons of it were used in Western Europe.

literature

  • AIS (1987). Assessing the effects of using EDTA in laundry detergents. Report of the Environmental Security Working Group of the AIS.
  • AWWR (1999). Working group of the waterworks on the Ruhr. Report on the 13th EDTA conversation, September 2, 1999.
  • Van Ginkel and Stroo (2000). Toxicity of EDTA to Activated Sludge. Final Research Report August 9, 2000.

Categories: Harmful Substance | Amine | Sodium compound | acetate