{"id":89,"date":"2026-09-23T17:44:22","date_gmt":"2026-09-23T17:44:22","guid":{"rendered":"https:\/\/peptidelattice.com\/?p=89"},"modified":"2026-09-23T17:44:26","modified_gmt":"2026-09-23T17:44:26","slug":"how-to-read-a-peptide-certificate-of-analysis","status":"publish","type":"post","link":"https:\/\/peptidelattice.com\/?p=89","title":{"rendered":"How to read a peptide certificate of analysis"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Materials sold by PeptideLattice are for laboratory research only. They are not medicines. This page explains how to read a certificate of analysis (COA). It is not a protocol and not medical advice.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A COA is a lab report for one lot. It is not a promise about every future lot. Ask for the COA that matches the lot number on the vial.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What to look for<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compound name and stated milligrams per vial<\/li>\n\n\n\n<li>Lot or batch number<\/li>\n\n\n\n<li>Test date<\/li>\n\n\n\n<li>Method (HPLC, MS, or both)<\/li>\n\n\n\n<li>Purity as a percentage<\/li>\n\n\n\n<li>Identity confirmation (does the mass match the sequence)<\/li>\n\n\n\n<li>Appearance (lyophilized powder)<\/li>\n\n\n\n<li>Storage note from the tester<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What a COA does not prove<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>That the vial is sterile for injection<\/li>\n\n\n\n<li>That the material is safe in humans or animals<\/li>\n\n\n\n<li>That the next lot will match this lot<\/li>\n\n\n\n<li>That a published animal study applies to your experiment<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How PeptideLattice handles documents<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Certificates are provided when available for the lot you receive. If a COA is missing for a lot, treat that as incomplete documentation and do not invent the numbers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Research use only. Not for human or animal use.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Materials sold by PeptideLattice are for laboratory research only. They are not medicines. This page explains how to read a certificate of analysis (COA). It is not a protocol and not medical advice. A COA is a lab report for one lot. It is not a promise about every future lot. Ask for the COA&#8230;<\/p>\n","protected":false},"author":1,"featured_media":88,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-89","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/peptidelattice.com\/index.php?rest_route=\/wp\/v2\/posts\/89","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/peptidelattice.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/peptidelattice.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/peptidelattice.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/peptidelattice.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=89"}],"version-history":[{"count":1,"href":"https:\/\/peptidelattice.com\/index.php?rest_route=\/wp\/v2\/posts\/89\/revisions"}],"predecessor-version":[{"id":90,"href":"https:\/\/peptidelattice.com\/index.php?rest_route=\/wp\/v2\/posts\/89\/revisions\/90"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/peptidelattice.com\/index.php?rest_route=\/wp\/v2\/media\/88"}],"wp:attachment":[{"href":"https:\/\/peptidelattice.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=89"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/peptidelattice.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=89"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/peptidelattice.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}