| 232.
Sodium Hypochlorite
|
- Hypochlorite of Soda
|
|
 |
|
| Chemical Formula |
NaClO |
| Molecular Weight |
74.45 |
| [Compositional Specifications of Sodium Hypochlorite] |
| Content |
Sodium Hypochlorite should be contain not less than 4.0% of available chlorine. |
| Description |
Sodium Hypochlorite is a colorless to light green-yellow liquid having an odor of chlorine. |
| Identification |
(1) When Sodium Hypochlorite is tested by Flame Coloration Test, it shows yellow.
(2) When diluted hydrochloric acid is added to Sodium Hypochlorite, gas is generated.
(3) Dip a red litmus paper in Sodium Hypochlorite. The color of the litmus paper changes to blue, and then fades. |
| Purity |
|
| Assay |
Weigh accurately about 3 g of Sodium Hypochlorite, and add 50 ml of water. Add 2 g of potassium iodine and 10 ml of diluted acetic acid. Titrate the liberated iodine with 0.1 N sodium thiosulfate (indicator : starch solution). Perform a blank test in the same manner, and make any necessary correction.
0.1 N sodium thiosulfate 1 ml = 3.546 mg of Cl |
| Permitted Use Level of Sodium Hypochlorite and Ingredient Containing it |
Sodium Hypochlorite should not be used with sesame seeds. |
