Edition: BP 2025 (Ph. Eur. 11.6 update)<\/p>\n
Compound Calamine Ointment<\/p>\n
Calamine and Coal Tar Ointment contains 12.5% w\/w each of Calamine and Zinc Oxide and 2.5% w\/w of Strong Coal Tar Solution in a suitable water-emulsifying basis.<\/p>\n
Extemporaneous preparation<\/p>\n
The following formula and directions apply.<\/p>\n
Calamine, finely sifted 125<\/p>\n
Zinc Oxide, finely sifted 125<\/p>\n
Strong Coal Tar Solution 25<\/p>\n
Hydrous Wool Fat 250<\/p>\n
White Soft Paraffin 475<\/p>\n
Melt together the Hydrous Wool Fat and the White Soft Paraffin. Triturate the Calamine and Zinc Oxide in the melted base and stir gently, when cooled, to about 40\u00b0. Gradually incorporate the Strong Coal Tar Solution and stir until cold.<\/p>\n
The ointment complies with the requirements stated under Topical Semi-solid Preparations and with the following requirements.<\/p>\n
Content of zinc compounds, calculated as ZnO<\/strong><\/p>\n 19.8 to 22.8% w\/w.<\/p>\n The residue obtained in the Assay is yellow when hot and white when cool.<\/p>\n Gently heat 1 g until the basis is completely volatilised or charred. Increase the heat until the carbon is removed and ignite the residue of ZnO until, after further ignition, two successive weighings do not differ by more than 0.2% of the weight of the residue. Each g of residue is equivalent to 0.8034 g of Zn.<\/p>\n Calamine and Coal Tar Ointment should be kept in a container that minimises evaporation losses.<\/p>\n","protected":false},"excerpt":{"rendered":" Edition: BP 2025 (Ph. Eur. 11.6 update) Compound Calamine Ointment DEFINITION Calamine and Coal Tar Ointment contains 12.5% w\/w each of Calamine and Zinc Oxide and 2.5% w\/w of Strong Coal Tar Solution in a suitable water-emulsifying basis. Extemporaneous preparation The following formula and directions apply. Calamine, finely sifted 125 Zinc Oxide, finely sifted 125…<\/p>\n","protected":false},"author":5,"featured_media":6513,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[175],"tags":[],"class_list":["post-6512","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-formulated-preparations-specific-monographs"],"acf":[],"_links":{"self":[{"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/6512","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/comments?post=6512"}],"version-history":[{"count":2,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/6512\/revisions"}],"predecessor-version":[{"id":6517,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/6512\/revisions\/6517"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/media\/6513"}],"wp:attachment":[{"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/media?parent=6512"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/categories?post=6512"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/tags?post=6512"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}IDENTIFICATION<\/h2>\n
ASSAY<\/h2>\n
STORAGE<\/h2>\n