Disodium Edetate is used as a Pharmaceutical aid, a sequestering agent and a chelating agent in Cosmetic Industry & detergent Industry.
Applications and Effects
It is used for bringing more lather in the detergents.
Description
White crystalline powder.
Solubility
Soluble in water.
Identification
(A) By Infrared Absorption. Undried.
(B) The red color is discharged, leaving a yellowish solution.
(C) A dense precipitate is formed.
pH
Between 4.0 and 6.0 in a solution (1 in 20).
Loss on drying
8.7% to 11.4%, Dry it at 150° C for 6 hours.
Calcium
No precipitate is formed.
Heavy Metals
Not more than 0.005% (Method II).
Limit of nitrilotriacetic acid
Not more than 0.1%.
Assay
99.0 % to 101.0 %, on dried basis
Appearance
White or almost whiter crystalline powder.
Soluble in water; Practically insoluble in ethanol (96%).
(A)The infrared absorption spectrum of the sample is con Concordant with the spectrum obtained from Disodium Edetate working standard.
(B)No precipitate is formed.
(C)No precipitate is formed.
(D)Gives the reactions of Sodium (A)A dense, white precipitate is formed. (B)No precipitate is formed.
Appearance of solution
Solution S is clear and Colourless.
4.0 to 5.5 for solution S
Impurities A
Not more than the area of the corresponding peak in the chromatogram obtained with the reference solution (0.1 %).
Iron
Not more than 80 ppm
Not more than 20 ppm
98.5 % to 101.0 %
A white, crystalline powder; odourless
Soluble in water; sparingly soluble in ethanol (95%), Practically insoluble in chloroform and in ether.
(A) Determine by infrared absorption spectrophotometry. Compare the spectrum with that obtained with disodium edetate RS.
(B) No precipitate is produced.
(C) No precipitate is produced.
(D) Gives the reactions of sodium salts (A) A dense, white precipitate is formed. (B) A yellow, crystalline precipitate is formed.
5.0 per cent w/v solution in carbon dioxide-free water is clear and colourless.
4.0 to 5.5 determined in 5.0 per cent w/v solution.
Impurity A
Not more than 0.1 per cent.