Disodium Edetate
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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. |
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(B)No precipitate is formed. |
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(C)No precipitate is formed. |
|
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(D)Gives the reactions of Sodium |
|
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%), |
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. |
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(D) Gives the reactions of sodium salts |
|
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 % |
