{"id":2892,"date":"2026-09-02T12:49:11","date_gmt":"2026-09-02T10:49:11","guid":{"rendered":"https:\/\/peptelia.com\/lagerung-haltbarkeit-2\/"},"modified":"2026-10-07T12:30:49","modified_gmt":"2026-10-07T10:30:49","slug":"storage-stability","status":"publish","type":"page","link":"https:\/\/peptelia.com\/en\/storage-stability\/","title":{"rendered":"Storage &#038; Stability"},"content":{"rendered":"\n<div class=\"snx-g\">\n  <div class=\"snx-g__hero\">\n    <span class=\"snx-g__eyebrow\">Guide<\/span>\n    <h2 style=\"font-size:clamp(27px,3.6vw,40px);line-height:1.15;margin:0 0 12px;font-weight:800;letter-spacing:.3px;color:#fff\">Storage &#038; Stability<\/h2>\n    <p>How research peptides stay stable \u2013 from freeze-dried powder to the reconstituted solution.<\/p>\n  <\/div>\n\n  <p class=\"snx-g__lead\">Whether a peptide remains stable for months or loses quality within days depends above all on one thing: storage. This guide summarises standard practice in the laboratory setting.<\/p>\n\n  <h2>Two states, two rules<\/h2>\n  <p>Peptides are supplied as a <strong>lyophilisate<\/strong> (freeze-dried powder) and only dissolved in water (reconstituted) when needed. These two states behave completely differently \u2013 and are stored accordingly.<\/p>\n\n  <h2>Lyophilisate \u2013 the unopened powder<\/h2>\n  <p>In the freeze-dried state, peptides are remarkably stable because there is hardly any water available for degradation reactions. What matters is keeping them cool, dry and dark.<\/p>\n  <ul>\n    <li>\n<strong>Short term<\/strong> (weeks): a refrigerator at 2\u20138 \u00b0C is generally sufficient.<\/li>\n    <li>\n<strong>Long term<\/strong> (months and longer): freezing at \u221220 \u00b0C or colder is standard.<\/li>\n    <li>\n<strong>Keep dry:<\/strong> moisture is the main enemy. Do not open the sealed vial in a humid environment; avoid condensation by letting a cold vial reach room temperature before opening.<\/li>\n    <li>\n<strong>Protect from light<\/strong> by storing in the original container.<\/li>\n  <\/ul>\n\n  <h2>Reconstituted solution \u2013 after dissolving<\/h2>\n  <p>Once the powder is dissolved in water, stability drops considerably. From this point on, consistent refrigeration applies.<\/p>\n  <ul>\n    <li>Dissolved material is kept in the refrigerator at <strong>2\u20138 \u00b0C<\/strong>, not at room temperature.<\/li>\n    <li>\n<strong>Repeated freezing and thawing is avoided<\/strong> \u2013 every cycle stresses the molecular structure. If you freeze, do so in a single portion where possible.<\/li>\n    <li>Protect the vial from light and store it upright.<\/li>\n    <li>Shelf life in solution is limited and depends on the compound \u2013 from a few days to several weeks.<\/li>\n  <\/ul>\n\n  <h2>The role of water<\/h2>\n  <p>Two types of water can be used for dissolving, and they differ significantly:<\/p>\n  <ul>\n    <li>\n<strong>Sterile water<\/strong> contains no preservative. Solutions prepared with it keep for only a very short time.<\/li>\n    <li>\n<strong>Bacteriostatic water (BAC)<\/strong> contains 0.9 % benzyl alcohol, which inhibits microbial growth. It extends the shelf life of the solution considerably and is the usual choice in the laboratory setting. Bacteriostatic water is available from laboratory suppliers \u2013 and Pept\u00e9lia includes it with every order.<\/li>\n  <\/ul>\n\n  <h2>Light-sensitive compounds<\/h2>\n  <p>Some compounds are also sensitive to light. <strong>GHK-Cu<\/strong>, for example, is a copper peptide whose blue-green colour doubles as a freshness indicator: if it fades, the copper has dissociated. Such compounds are always stored in the original vial and kept dark.<\/p>\n\n  <h2>Rules of thumb at a glance<\/h2>\n  <table>\n    <thead><tr>\n<th>State<\/th>\n<th>Temperature<\/th>\n<th>Light<\/th>\n<th>Shelf life (guide value)<\/th>\n<\/tr><\/thead>\n    <tbody>\n      <tr>\n<td>Lyophilisate, short term<\/td>\n<td>2\u20138 \u00b0C<\/td>\n<td>dark<\/td>\n<td>Weeks<\/td>\n<\/tr>\n      <tr>\n<td>Lyophilisate, long term<\/td>\n<td>\u221220 \u00b0C or colder<\/td>\n<td>dark<\/td>\n<td>Months+<\/td>\n<\/tr>\n      <tr>\n<td>Reconstituted (BAC)<\/td>\n<td>2\u20138 \u00b0C<\/td>\n<td>dark<\/td>\n<td>Days to weeks<\/td>\n<\/tr>\n      <tr>\n<td>Reconstituted (sterile)<\/td>\n<td>2\u20138 \u00b0C<\/td>\n<td>dark<\/td>\n<td>very short<\/td>\n<\/tr>\n    <\/tbody>\n  <\/table>\n  <p>These values are general guidance and vary by compound. The batch-specific data sheet always takes precedence.<\/p>\n\n  <div class=\"snx-g__band\">\n    <h2>Quick maths, correct preparation<\/h2>\n    <p>Before you prepare a solution, it is worth checking the calculator: it shows you the concentration that results from vial size and solvent volume \u2013 and how many withdrawals one vial provides.<\/p>\n    <a class=\"snx-g__cta\" href=\"https:\/\/peptelia.com\/en\/peptide-calculator\/\">Go to the peptide calculator<\/a>\n  <\/div>\n<p class=\"snx-g__note\">All information is provided solely for general, scientific and research-related information purposes. The products offered by Pept\u00e9lia are not intended for human or animal consumption. This page does not constitute instructions for use, a dosing recommendation or medical advice. For health-related questions, please consult a physician or pharmacist.<\/p>\n\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>How research peptides stay stable \u2013 from freeze-dried powder to the reconstituted solution.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","footnotes":""},"class_list":["post-2892","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Peptide Storage &amp; Stability Guide | Pept\u00e9lia<\/title>\n<meta name=\"description\" content=\"How to store research peptides: lyophilised and reconstituted vials, temperature, light and shelf life, with practical notes for the lab.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/peptelia.com\/en\/storage-stability\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Peptide Storage &amp; 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