Color— Melt about 10 g on a steam bath, and pour 5 mL of 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 1.6 mL of ferric chloride CS and 3.4 mL of 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 281— Heat 2 g 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 rosin under Petrolatum.

Topic/Question	Contact	Expert Committee
Monograph	Kevin T. Moore, Ph.D. Scientist 1-301-816-8369	(EM205) Excipient Monographs 2

USP32–NF27 Page 3264