Edition: BP 2025 (Ph. Eur. 11.6 update)
DEFINITION
Hydrogen Peroxide Mouthwash is Hydrogen Peroxide Solution (6 per cent).
The mouthwash complies with the requirements stated under Oromucosal Preparations and with the following requirements.
Content of hydrogen peroxide, H₂O₂
5.0 to 7.0% w/v.
IDENTIFICATION;
Acidity; Non-volatile matter; Organic stabilisers
Complies with the requirements stated under Hydrogen Peroxide Solution (6 per cent).
ASSAY
Dilute 10 mL to 100 mL with water. To 10 mL of the resulting solution add 20 mL of 1M sulfuric acid and titrate with 0.02M potassium permanganate VS.
Each mL of 0.02M potassium permanganate VS is equivalent to 1.701 mg of H₂O₂.
STORAGE
Hydrogen Peroxide Mouthwash should be protected from light.
