Edition: BP 2025 (Ph. Eur. 11.6 update)<\/p>\n
Action and use<\/strong><\/p>\n Astringent.<\/p>\n Content<\/strong><\/p>\n 99.0 per cent to 104.0 per cent.<\/p>\n White or almost white, crystalline powder or colourless transparent crystals, efflorescent.<\/p>\n Very soluble in water, practically insoluble in ethanol (96 per cent).<\/p>\n A. Solution S (see Tests) gives the reactions of sulfates (2.3.1).<\/p>\n B. Solution S gives the reaction of zinc (2.3.1).<\/p>\n C. It complies with the limits of the assay.<\/p>\n Dissolve 2.5 g in carbon dioxide-free water R and dilute to 50 mL with the same solvent.<\/p>\n Solution S is clear (2.2.1) and colourless (2.2.2, Method II).<\/p>\n 4.4 to 5.6 for solution S.<\/p>\n Maximum 300 ppm.<\/p>\n Dilute 3.3 mL of solution S to 15 mL with water R.<\/p>\n Maximum 100 ppm.<\/p>\n Dilute 2 mL of solution S to 10 mL with water R. Use in this test 0.5 mL of thioglycollic acid R.<\/p>\n Dissolve 0.200 g in 5 mL of dilute acetic acid R. Carry out the complexometric titration of zinc (2.5.11). 1 mL of 0.1 M sodium edetate is equivalent to 26.95 mg of ZnSO4<\/sub>,6H2<\/sub>0.<\/p>\n In a non-metallic, airtight container.<\/p>\n","protected":false},"excerpt":{"rendered":" Edition: BP 2025 (Ph. Eur. 11.6 update) Action and use Astringent. DEFINITION Content 99.0 per cent to 104.0 per cent. CHARACTERS Appearance White or almost white, crystalline powder or colourless transparent crystals, efflorescent. Solubility Very soluble in water, practically insoluble in ethanol (96 per cent). IDENTIFICATION A. Solution S (see Tests) gives the reactions of…<\/p>\n","protected":false},"author":5,"featured_media":31927,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[174],"tags":[],"class_list":["post-31925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-medicinal-substances"],"acf":[],"_links":{"self":[{"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/31925","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=31925"}],"version-history":[{"count":2,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/31925\/revisions"}],"predecessor-version":[{"id":31936,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/31925\/revisions\/31936"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/media\/31927"}],"wp:attachment":[{"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/media?parent=31925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/categories?post=31925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/tags?post=31925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}DEFINITION<\/h2>\n
CHARACTERS<\/h2>\n
Appearance<\/h3>\n
Solubility<\/h3>\n
IDENTIFICATION<\/h2>\n
TESTS<\/h2>\n
Solution S<\/h3>\n
Appearance of solution<\/h3>\n
pH (2.2.3)<\/h3>\n
Chlorides (2.4.4)<\/h3>\n
Iron (2.4.9)<\/h3>\n
ASSAY<\/h2>\n
STORAGE<\/h2>\n