Hydrogen Peroxide Solution (6 percent)

Action and use

Antiseptic; deodorant.

 Preparation

 Hydrogen Peroxide Mouthwash

DEFINITION

Hydrogen Peroxide Solution (6 per cent) is an aqueous solution of hydrogen  peroxide containing not less than 5.0% w/v and not more than 7.0% w/v of H2O2  (34.01), corresponding to about 20 times its volume of available oxygen. It may  contain a suitable stabilizing agent.

CHARACTERISTICS

A clear, colourless liquid.

 IDENTIFICATION

A. To 1 ml add 0.2 ml of 1M sulphuric acid  and 0.25 ml of 0.02M potassium  permanganate. The solution becomes colourless with evolution of gas.

 

 B. Shake 0.05 ml with 2 ml of 1M sulphuric acid , 2 ml of ether  and 0.05 ml of  potassium chromate solution. The ether layer is blue.

 

 C. Complies with the requirement for the content of H2O2. TESTS

 

 Acidity

Dilute 10 ml with 20 ml of water  and add 0.25 ml of methyl red solution. Not less  than 0.05 ml and not more than 1.0 ml of 0.1M sodium hydroxide VS is required to  change the colour .

ASSAY

Dilute 10 ml to 100 ml with water . To 10 ml of the resulting solution add 20 ml of 1M  sulphuric 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 or 0.56 ml of  oxygen.  

    

Calculation:

Result: