Color— Melt about 10g on a steam bath,and pour 5mLof the liquid into a clear-glass,16-×150-mm bacteriological test tube:the warm,melted liquid is not darker than a solution made by mixing 1.6mLof ferric chloride CSand 3.4mLof water in a similar tube,the comparison of the two being made in reflected light against a white background,the tubes being held directly against the background at such an angle that there is no fluorescence.

Residue on ignition á281ñ— Heat 2g in an open porcelain or platinum dish over a flame:it volatilizes without emitting an acrid odor and on ignition yields not more than 0.05%of residue.

Other requirements— It meets the requirements for Packaging and storage,Labeling,Specific gravity,Melting range,Consistency,Alkalinity,Acidity,Organic acids,and Fixed oils,fats,and rosinunder Petrolatum.

Expert Committee:(EMC)Excipients:Monograph Content

USP28–NF23Page 1524

Phone Number:1-301-816-8323