(Concentrated Hydrochloric Acid, Ph. Eur. monograph 0002)<\/p>\n
HCl\u00a0 \u00a0 \u00a0 36.46\u00a0 \u00a0 \u00a0 7647-01-0<\/p>\n
Preparation<\/strong><\/p>\n Dilute Hydrochloric Acid<\/p>\n Content<\/p>\n 35.0 per cent m\/m to 39.0 per cent m\/m.<\/p>\n Clear, colourless, fuming liquid.<\/p>\n Miscible with water.<\/p>\n About 1.18.<\/p>\n A. Dilute with water R. The solution is strongly acid (2.2.4).<\/p>\n B. It gives reaction (a) of chlorides (2.3.1).<\/p>\n C. It complies with the limits of the assay.<\/p>\n To 2 mL add 8 mL of water R. The solution is clear (2.2.1) and colourless (2.2.2, Method II).<\/p>\n Maximum 4 ppm.<\/p>\n To 15 mL add 100 mL of carbon dioxide-free water R, 1 mL of a 100 g\/L solution of potassium iodide R and 0.5 mL of iodide-free starch solution R. Allow to stand in the dark for 2 min. Any blue colour disappears on the addition of 0.2 mL of 0.01 M sodium thiosulfate.<\/p>\n Maximum 20 ppm.<\/p>\n To 6.4 mL add 10 mg of sodium hydrogen carbonate R and evaporate to dryness on a water-bath.<\/p>\n Dissolve the residue in 15 mL of distilled water R.<\/p>\n Maximum 0.01 per cent.<\/p>\n Evaporate 100.0 g to dryness on a water-bath or using a rotary evaporator and dry the residue at 100-105 \u00b0C. The residue weighs a maximum of 10 mg.<\/p>\n Weigh accurately a ground-glass-stoppered flask containing 30 mL of water R. Introduce 1.5 mL of the acid to be examined and weigh again. Titrate with 1 M sodium hydroxide, determining the end-point potentiometrically (2.2.20).<\/p>\n 1 mL of 1 M sodium hydroxide is equivalent to 36.46 mg of HCl.<\/p>\n In a stoppered container made of glass or another inert material, at a temperature not exceeding 30 \u00b0C.<\/p>\n","protected":false},"excerpt":{"rendered":" (Concentrated Hydrochloric Acid, Ph. Eur. monograph 0002) HCl\u00a0 \u00a0 \u00a0 36.46\u00a0 \u00a0 \u00a0 7647-01-0 Preparation Dilute Hydrochloric Acid DEFINITION Content 35.0 per cent m\/m to 39.0 per cent m\/m. CHARACTERS Appearance Clear, colourless, fuming liquid. Solubility Miscible with water. Relative density About 1.18. IDENTIFICATION A. Dilute with water R. The solution is strongly acid (2.2.4)….<\/p>\n","protected":false},"author":2,"featured_media":14919,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[174],"tags":[],"class_list":["post-14917","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\/14917","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/comments?post=14917"}],"version-history":[{"count":2,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/14917\/revisions"}],"predecessor-version":[{"id":14921,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/posts\/14917\/revisions\/14921"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/media\/14919"}],"wp:attachment":[{"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/media?parent=14917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/categories?post=14917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nhathuocngocanh.com\/bp\/wp-json\/wp\/v2\/tags?post=14917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}DEFINITION<\/h2>\n
CHARACTERS<\/h2>\n
Appearance<\/h3>\n
Solubility<\/h3>\n
Relative density<\/h4>\n
IDENTIFICATION<\/h2>\n
TESTS<\/h2>\n
Appearance of solution<\/h3>\n
Free chlorine<\/h3>\n
Sulfates (2.4.13)<\/h3>\n
Residue on evaporation<\/h4>\n
ASSAY<\/h2>\n
STORAGE<\/h2>\n