Disodium Edetate

Description

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.

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Specifications

TESTS SPECIFICATIONS

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

TESTS SPECIFICATIONS

Appearance

White or almost whiter crystalline powder.

Solubility

Soluble in water; Practically insoluble in ethanol (96%).

Identification

First identification A, B, D. Second Identification B,C, D.
 

(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.

pH

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

Heavy Metals

Not more than 20 ppm

Assay

98.5 % to 101.0 %

TESTS SPECIFICATIONS

Description

A white, crystalline powder; odourless

Solubility

Soluble in water; sparingly soluble in ethanol (95%),
Practically insoluble in chloroform and in ether.

Identification

(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.

Appearance of solution

5.0 per cent w/v solution in carbon dioxide-free water is clear and colourless.

pH

4.0 to 5.5 determined in 5.0 per cent w/v solution.

Impurity A

Not more than 0.1 per cent.

Heavy Metals

Not more than 20 ppm

Iron

Not more than 80 ppm

Assay

98.5 % to 101.0 %