{"id":3424,"date":"2025-07-31T16:13:35","date_gmt":"2025-07-31T16:13:35","guid":{"rendered":"https:\/\/discover.restek.com\/?p=3424"},"modified":"2026-04-02T14:33:20","modified_gmt":"2026-04-02T14:33:20","slug":"what-is-the-expiration-date-of-my-reference-standard","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/fr\/faq-it\/gnot4938\/what-is-the-expiration-date-of-my-reference-standard","title":{"rendered":"What is the expiration date of my reference standard?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The expiration date of an unopened ampul, stored under the recommended storage conditions, is identified on your certificate of analysis. (If only the month and year are given, the standard expires on the last day of the month.) The expiration date is also printed on the ampul label. Once opened, the integrity of the standard is subject to handling and storage conditions, and it cannot be guaranteed.<\/p>\n\n\n\n<div class=\"wp-block-group hub-fullwidth-container\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><style>.kadence-column3424_bc111a-3d > .kt-inside-inner-col,.kadence-column3424_bc111a-3d > .kt-inside-inner-col:before{border-top-left-radius:16px;border-top-right-radius:16px;border-bottom-right-radius:16px;border-bottom-left-radius:16px;}.kadence-column3424_bc111a-3d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3424_bc111a-3d > .kt-inside-inner-col{flex-direction:column;}.kadence-column3424_bc111a-3d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3424_bc111a-3d > .kt-inside-inner-col{background-image:url('https:\/\/discover.restek.com\/wp-content\/uploads\/standards-finder-footer-ad-desktop.jpg');background-size:cover 100%;background-position:74% 54%;background-attachment:scroll;background-repeat:no-repeat;}.kadence-column3424_bc111a-3d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3424_bc111a-3d{position:relative;}.kadence-column3424_bc111a-3d, .kt-inside-inner-col > .kadence-column3424_bc111a-3d:not(.specificity){margin-top:65px;margin-bottom:10px;}@media all and (max-width: 1024px){.kadence-column3424_bc111a-3d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3424_bc111a-3d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3424_bc111a-3d kvs-md-false kvs-sm-false hub-guttered-centered-container\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id3424_7d98c6-fe > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3424_7d98c6-fe > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3424_7d98c6-fe > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-right:var(--global-kb-spacing-5xl, 10rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3424_7d98c6-fe > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id3424_7d98c6-fe > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id3424_7d98c6-fe > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3424_7d98c6-fe alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{display:flex;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{padding-top:12px;padding-bottom:12px;padding-left:30px;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col,.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:flex-start;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col > .kb-image-is-ratio-size{align-self:stretch;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col > .wp-block-kadence-advancedgallery{align-self:stretch;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column3424_0d8fb8-2a{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column3424_0d8fb8-2a{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3424_0d8fb8-2a{position:relative;}.kadence-column3424_0d8fb8-2a, .kt-inside-inner-col > .kadence-column3424_0d8fb8-2a:not(.specificity){margin-top:var(--global-kb-spacing-xs, 1rem);margin-bottom:var(--global-kb-spacing-xs, 1rem);}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column3424_0d8fb8-2a{align-self:center;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column3424_0d8fb8-2a{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 1024px){.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:flex-start;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column3424_0d8fb8-2a{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column3424_0d8fb8-2a{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column3424_0d8fb8-2a > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:flex-start;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3424_0d8fb8-2a kb-section-dir-vertical\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3424_725809-62, .wp-block-kadence-advancedheading.kt-adv-heading3424_725809-62[data-kb-block=\"kb-adv-heading3424_725809-62\"]{padding-right:0px;padding-left:0px;text-align:left;font-size:40px;font-weight:400;font-style:normal;font-family:Inter;text-transform:none;}.wp-block-kadence-advancedheading.kt-adv-heading3424_725809-62 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3424_725809-62[data-kb-block=\"kb-adv-heading3424_725809-62\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3424_725809-62 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3424_725809-62[data-kb-block=\"kb-adv-heading3424_725809-62\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading3424_725809-62, 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.kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns3424_da8775-d3 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns3424_da8775-d3 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns3424_da8775-d3\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn3424_65e40f-3d.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn3424_65e40f-3d.kb-button{color:var(--global-palette9, #ffffff);background:#1b3f73;font-size:24px;line-height:20px;font-family:'Open Sans';font-weight:600;border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;border-top:0px solid #1b3f73;border-right:0px solid #1b3f73;border-bottom:0px solid #1b3f73;border-left:0px solid #1b3f73;padding-top:12px;padding-right:100px;padding-bottom:12px;padding-left:100px;}.kb-btn3424_65e40f-3d.kb-button 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img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading3424_d24214-a2, .wp-block-kadence-advancedheading.kt-adv-heading3424_d24214-a2[data-kb-block=\"kb-adv-heading3424_d24214-a2\"]{margin-top:480px;font-size:48px;}}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading3424_d24214-a2, .wp-block-kadence-advancedheading.kt-adv-heading3424_d24214-a2[data-kb-block=\"kb-adv-heading3424_d24214-a2\"]{margin-top:300px;font-size:40px;line-height:42px;}}<\/style>\n<h2 class=\"kt-adv-heading3424_d24214-a2 wp-block-kadence-advancedheading has-theme-palette-9-color has-text-color\" data-kb-block=\"kb-adv-heading3424_d24214-a2\"><strong>Find Reference Standards Fast<\/strong><\/h2>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading3424_0c14a9-05, 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(If only the month and year are given, the standard expires on the last day of the month.) The expiration date is also printed on the ampul label. 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