Carbamide Peroxide
(kar' ba mide per ox' ide).
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94.07Urea, compd. with hydrogen peroxide (1:1).
Urea compound with hydrogen peroxide (1:1)
[124-43-6].» Carbamide Peroxide contains not less than 96.0 percent and not more than 102.0 percent of CH6N2O3.
Packaging and storage—
Preserve in tight, light-resistant containers, and avoid exposure to excessive heat.
Identification—
A:
Mix 1 mL of a solution (1 in 10) of it with 1 mL of nitric acid: a white, crystalline precipitate is formed.
B:
A solution of it (1 in 10) responds to the tests for Peroxide 
191
.
191.
Assay—
Transfer about 100 mg of Carbamide Peroxide, accurately weighed, to a 500-mL iodine flask with the aid of 25 mL of water, add 5 mL of glacial acetic acid, and mix. Add 2 g of potassium iodide and 1 drop of ammonium molybdate TS, insert the stopper, and allow to stand in the dark for 10 minutes. Titrate the liberated iodine with 0.1 N sodium thiosulfate VS, adding 3 mL of starch TS as the endpoint is approached. Each mL of 0.1 N sodium thiosulfate is equivalent to 4.704 mg of CH6N2O3.
Auxiliary Information—
Please check for your question in the FAQs before contacting USP.
| Topic/Question | Contact | Expert Committee |
|---|---|---|
| Monograph | Domenick Vicchio, Ph.D.
Senior Scientific Liaison 1-301-998-6828 |
(SM42010) Monographs - Small Molecules 4 |
USP35–NF30 Page 2485