Sodium Hypochlorite Solution
NaClO
74.44
74.44Hypochlorous acid, sodium salt.
Sodium hypochlorite
[7681-52-9].» Sodium Hypochlorite Solution contains not less than 4.0 percent and not more than 6.0 percent, by weight, of NaClO.
[Caution—This Solution is not suitable for application to wounds.
]
Packaging and storage—
Preserve in tight, light-resistant containers, at a temperature not exceeding 25
.
.
Identification—
A:
The Solution at first colors red litmus blue and then bleaches it.
B:
The addition of 3 N hydrochloric acid to the Solution causes an evolution of chlorine.
C:
The solution obtained in Identification test B responds to the flame test for Sodium 
191
.
191.
Assay—
Weigh accurately, in a glass-stoppered flask, about 3 mL of Solution, and dilute it with 50 mL of water. Add 2 g of potassium iodide and 10 mL of 6 N acetic acid, and titrate the liberated iodine with 0.1 N sodium thiosulfate VS, adding 3 mL of starch TS as the endpoint is approached. Perform a blank determination, and make any necessary correction. Each mL of 0.1 N sodium thiosulfate is equivalent to 3.722 mg of NaClO.
Auxiliary Information—
Please check for your question in the FAQs before contacting USP.
| Topic/Question | Contact | Expert Committee |
|---|---|---|
| Monograph | Ahalya Wise, M.S.
Senior Scientific Liaison 1-301-816-8161 |
(SM12010) Monographs - Small Molecules 1 |
USP35–NF30 Page 4662