{"id":591423,"date":"2024-11-05T21:19:31","date_gmt":"2024-11-05T21:19:31","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/iso-1391-51981\/"},"modified":"2024-11-05T21:19:31","modified_gmt":"2024-11-05T21:19:31","slug":"iso-1391-51981","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/iso\/iso-1391-51981\/","title":{"rendered":"ISO 1391-5:1981"},"content":{"rendered":"<p>The method is applicable to solid paraformaldehyde of aldehyde contents in the range 67 % (m\/m) to 97 % (m\/m). The principle consists in the reaction of aldehyde present in a test portion with neutralized sodium sulphite solution. Titration of the liberated sodium hydroxide with sulphuric acid solution using thymolphthalein as indicator. &#8211; This document has also been approved by the IUPAC.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Paraformaldehyde for industrial use \u2014 Methods of test \u2014 Determination of aldehyde content \u2014 Titrimetric method<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/iso\/\"><b>ISO<\/b><\/a><\/td>\n<td>1981-05<\/td>\n<td>4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":0,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1021,2634],"product_tag":[],"class_list":{"0":"post-591423","1":"product","2":"type-product","3":"status-publish","5":"product_cat-71-080-80","6":"product_cat-iso","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/591423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=591423"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=591423"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=591423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}