Zinc Oxide Paste
» Zinc Oxide Paste contains not less than 24.0 percent and not more than 26.0 percent of ZnO.
It may be prepared as follows:
Zinc Oxide 250 g
Starch 250 g
White Petrolatum 500 g
To make 1000 g
Mix the ingredients.
Packaging and storage— Preserve in well-closed containers, and avoid prolonged exposure to temperatures exceeding 30.
Identification— The residue obtained in the Assay is yellow when hot and white when cool.
Minimum fill 755: meets the requirements.
Assay— Using about 600 mg of Paste, proceed as directed in the Assay under Zinc Oxide Ointment.
Auxiliary Information— Please check for your question in the FAQs before contacting USP.
Topic/Question Contact Expert Committee
Monograph Feiwen Mao, M.S.
Senior Scientific Liaison
(SM32010) Monographs - Small Molecules 3
USP35–NF30 Page 5075