Benzyl Benzoate Lotion
» Benzyl Benzoate Lotion contains not less than 26.0 percent and not more than 30.0 percent (w/w) of C14H12O2.
Mix the Triethanolamine with the Oleic Acid, add the Benzyl Benzoate, and mix. Transfer the mixture to a suitable container of about 2000-mL capacity, add 250 mL of Purified Water, and shake the mixture thoroughly. Finally add the remaining Purified Water, and again shake thoroughly.
Packaging and storage Preserve in tight containers.
pH 791: between 8.5 and 9.2.
Assay Place about 5 g of Lotion, accurately weighed, in a conical flask. Add 25 mL of alcohol and 2 drops of phenolphthalein TS. Cool the solution to about 15, and titrate quickly with 0.1 N sodium hydroxide to a slight pink color. Add 50.0 mL of 0.5 N alcoholic potassium hydroxide VS, connect the flask to a reflux condenser, and boil gently for 1 hour. Cool, promptly add phenolphthalein TS, and titrate with 0.5 N hydrochloric acid VS. Perform a blank determination (see Residual Titrations under Titrimetry 541). Each mL of 0.5 N alcoholic potassium hydroxide is equivalent to 106.1 mg of C14H12O2.
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USP32NF27 Page 1652Pharmacopeial Forum: Volume No. 30(2) Page 457