{"id":1650,"date":"2026-10-06T12:28:29","date_gmt":"2026-10-06T12:28:29","guid":{"rendered":"https:\/\/dev.ich.org\/index.php\/guidelines\/q1b\/"},"modified":"2026-10-06T12:28:29","modified_gmt":"2026-10-06T12:28:29","slug":"q1b","status":"publish","type":"guideline","link":"https:\/\/dev.ich.org\/index.php\/guidelines\/q1b\/","title":{"rendered":"Q1B \u2013 Stability Testing : Photostability Testing of New Drug Substances and Products"},"content":{"rendered":"<p>The ICH Harmonised Guideline was finalised under <em>Step 4<\/em> in November 1996. This document is an annex to the main stability Guideline, and gives guidance on the basic testing protocol required to evaluate the light sensitivity and stability of new drugs and products.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ICH Harmonised Guideline was finalised under Step 4 in November 1996. This document is an annex to the main stability Guideline, and gives guidance on the basic testing protocol required to evaluate the light\u2026<\/p>\n","protected":false},"featured_media":0,"template":"","guideline_category":[18],"guideline_tag":[],"rd_phase":[],"class_list":["post-1650","guideline","type-guideline","status-publish","hentry","guideline_category-quality"],"acf":[],"_links":{"self":[{"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/guideline\/1650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/guideline"}],"about":[{"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/types\/guideline"}],"version-history":[{"count":0,"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/guideline\/1650\/revisions"}],"wp:attachment":[{"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/media?parent=1650"}],"wp:term":[{"taxonomy":"guideline_category","embeddable":true,"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/guideline_category?post=1650"},{"taxonomy":"guideline_tag","embeddable":true,"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/guideline_tag?post=1650"},{"taxonomy":"rd_phase","embeddable":true,"href":"https:\/\/dev.ich.org\/index.php\/wp-json\/wp\/v2\/rd_phase?post=1650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}