{"id":2594,"date":"2026-04-27T09:06:04","date_gmt":"2026-04-27T09:06:04","guid":{"rendered":"https:\/\/www.pharmacopoeiatest.com\/?p=2594"},"modified":"2026-04-27T09:07:46","modified_gmt":"2026-04-27T09:07:46","slug":"usp-381","status":"publish","type":"post","link":"https:\/\/www.pharmacopoeiatest.com\/ro\/usp-381\/","title":{"rendered":"USP 381"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"2594\" class=\"elementor elementor-2594\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-74ebbd5 e-flex e-con-boxed e-con e-parent\" data-id=\"74ebbd5\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91c17fd elementor-widget elementor-widget-heading\" data-id=\"91c17fd\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Elastomeric Closures Functionality Test<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4fe14a5 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"4fe14a5\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a8a222 elementor-widget elementor-widget-heading\" data-id=\"4a8a222\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">USP 381<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dde678c e-flex e-con-boxed e-con e-parent\" data-id=\"dde678c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-273bb55 elementor-widget elementor-widget-text-editor\" data-id=\"273bb55\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"5987\" data-end=\"6520\">USP 381 defines functional testing requirements for elastomeric closures, focusing on penetrability, fragmentation, and self-sealing performance. These tests simulate real usage conditions to ensure closures maintain integrity, prevent contamination, and allow safe needle penetration. Compliance requires precise force measurement, controlled puncture procedures, and reliable leak detection. Proper instrumentation and standardized methods help manufacturers meet regulatory expectations and ensure pharmaceutical packaging safety.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57e0b85 elementor-widget elementor-widget-heading\" data-id=\"57e0b85\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Elastomeric Closures Functionality Test<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe4166a elementor-widget elementor-widget-text-editor\" data-id=\"fe4166a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"1199\" data-end=\"1298\">The <strong data-start=\"1203\" data-end=\"1246\">elastomeric closures functionality test<\/strong> in USP 381 evaluates three key performance aspects:<\/p><ul data-start=\"1300\" data-end=\"1367\"><li data-section-id=\"cecj6\" data-start=\"1300\" data-end=\"1319\"><strong data-start=\"1302\" data-end=\"1319\">Penetrabilitate<\/strong><\/li><li data-section-id=\"1jwi34l\" data-start=\"1320\" data-end=\"1339\"><strong data-start=\"1322\" data-end=\"1339\">Fragmentation<\/strong><\/li><li data-section-id=\"1pqh1g6\" data-start=\"1340\" data-end=\"1367\"><strong data-start=\"1342\" data-end=\"1367\">Self-sealing capacity<\/strong><\/li><\/ul><p data-start=\"1369\" data-end=\"1600\">These tests simulate actual usage conditions, particularly needle insertion during drug administration. Proper sample preparation is essential, as closures must be treated and dried according to specified procedures before testing.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95ce1a1 elementor-widget elementor-widget-heading\" data-id=\"95ce1a1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Penetrability Test for Rubber Stoppers<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-75c69a1 e-con-full e-flex e-con e-child\" data-id=\"75c69a1\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ec04e8e elementor-widget elementor-widget-text-editor\" data-id=\"ec04e8e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"1650\" data-end=\"1771\">The <strong data-start=\"1654\" data-end=\"1696\">penetrability test for rubber stoppers<\/strong> measures the force required for a hypodermic needle to pierce the closure.<\/p><h3 data-section-id=\"oz1o92\" data-start=\"1773\" data-end=\"1793\">Principiul de testare<\/h3><p data-start=\"1794\" data-end=\"1965\">A standardized needle (long bevel, 12 \u00b1 2\u00b0) penetrates the closure vertically. The test quantifies resistance force, which directly impacts usability in clinical settings.<\/p><h3 data-section-id=\"wq11jx\" data-start=\"1967\" data-end=\"1989\">Key Requirements<\/h3><ul data-start=\"1990\" data-end=\"2100\"><li data-section-id=\"10c22n3\" data-start=\"1990\" data-end=\"2027\">Maximum allowable force: <strong data-start=\"2017\" data-end=\"2027\">\u2264 10 N<\/strong><\/li><li data-section-id=\"1ez278j\" data-start=\"2028\" data-end=\"2063\">Measurement accuracy: <strong data-start=\"2052\" data-end=\"2063\">\u00b10.25 N<\/strong><\/li><li data-section-id=\"1yge908\" data-start=\"2064\" data-end=\"2100\">Each closure uses a <strong data-start=\"2086\" data-end=\"2100\">new needle<\/strong><\/li><\/ul><h3 data-section-id=\"1hksdyr\" data-start=\"2102\" data-end=\"2125\">Practical Insight<\/h3><p data-start=\"2126\" data-end=\"2164\">Excessive penetration force can cause:<\/p><ul data-start=\"2165\" data-end=\"2285\"><li data-section-id=\"xe8wie\" data-start=\"2165\" data-end=\"2202\">Difficulty in drug administration<\/li><li data-section-id=\"1nab9ao\" data-start=\"2203\" data-end=\"2231\">Needle bending or damage<\/li><li data-section-id=\"1vqzmwf\" data-start=\"2232\" data-end=\"2285\">Poor user experience for healthcare professionals<\/li><\/ul><h3 data-section-id=\"1gkez9i\" data-start=\"2287\" data-end=\"2315\">Recommended Instrument<\/h3><p data-start=\"2316\" data-end=\"2558\">The <strong data-start=\"2320\" data-end=\"2370\">Cell Instruments NPT-01 Needle Puncture Tester<\/strong> provides precise force measurement with controlled speed and displacement. Its programmable testing parameters ensure compliance with USP 381 while improving repeatability and efficiency.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e77be2a elementor-widget elementor-widget-image\" data-id=\"e77be2a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.pharmacopoeiatest.com\/ro\/category\/product\/puncture-test\/\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"519\" height=\"1024\" src=\"https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-519x1024.webp\" class=\"attachment-large size-large wp-image-2597\" alt=\"USP 381 vial stopper functionality test Penetrability Test for Rubber Stoppers\" srcset=\"https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-519x1024.webp 519w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-152x300.webp 152w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-768x1514.webp 768w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-779x1536.webp 779w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-1039x2048.webp 1039w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-6x12.webp 6w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/USP-381-vial-stopper-functionality-test-Penetrability-Test-for-Rubber-Stoppers-scaled.webp 1299w\" sizes=\"(max-width: 519px) 100vw, 519px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-feea50e elementor-widget elementor-widget-heading\" data-id=\"feea50e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Test de fragmentare<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bc23b60 elementor-widget elementor-widget-text-editor\" data-id=\"bc23b60\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"2588\" data-end=\"2684\">Fragmentation evaluates whether rubber particles are generated during repeated needle punctures.<\/p><h3 data-section-id=\"1ql2t3y\" data-start=\"2686\" data-end=\"2715\">Test Procedure Overview<\/h3><ul data-start=\"2716\" data-end=\"2930\"><li data-section-id=\"1yd303t\" data-start=\"2716\" data-end=\"2765\">Closures are mounted on vials and conditioned<\/li><li data-section-id=\"1uvvl40\" data-start=\"2766\" data-end=\"2833\">Each closure is punctured <strong data-start=\"2794\" data-end=\"2831\">four times at different locations<\/strong><\/li><li data-section-id=\"uwdzxz\" data-start=\"2834\" data-end=\"2896\">Extracted liquid is filtered through a <strong data-start=\"2875\" data-end=\"2894\">\u2264 0.5 \u03bcm filter<\/strong><\/li><li data-section-id=\"8cha51\" data-start=\"2897\" data-end=\"2930\">Visible particles are counted<\/li><\/ul><h3 data-section-id=\"5d1q1o\" data-start=\"2932\" data-end=\"2957\">Acceptance Criteria<\/h3><ul data-start=\"2958\" data-end=\"2999\"><li data-section-id=\"xvrylq\" data-start=\"2958\" data-end=\"2999\"><strong data-start=\"2960\" data-end=\"2999\">No more than five visible fragments<\/strong><\/li><\/ul><h3 data-section-id=\"158i3g5\" data-start=\"3001\" data-end=\"3021\">De ce este important<\/h3><p data-start=\"3022\" data-end=\"3126\">Fragmentation poses a direct contamination risk. Particles introduced into injectable drugs can lead to:<\/p><ul data-start=\"3127\" data-end=\"3203\"><li data-section-id=\"1xfrf68\" data-start=\"3127\" data-end=\"3153\">Patient safety hazards<\/li><li data-section-id=\"10i7v7z\" data-start=\"3154\" data-end=\"3183\">Nerespectarea reglement\u0103rilor<\/li><li data-section-id=\"dwfxol\" data-start=\"3184\" data-end=\"3203\">Retrageri de produse<\/li><\/ul><p data-start=\"3205\" data-end=\"3313\"><strong data-start=\"3205\" data-end=\"3233\">Microscopic verification<\/strong> is used when particle identification is uncertain, ensuring result reliability.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c29c0a8 elementor-widget elementor-widget-heading\" data-id=\"c29c0a8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Elastomeric Closure Self Sealing Test<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f3d6a1d e-con-full e-flex e-con e-child\" data-id=\"f3d6a1d\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b26648c elementor-widget elementor-widget-text-editor\" data-id=\"b26648c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"3362\" data-end=\"3474\">The <strong data-start=\"3366\" data-end=\"3407\">elastomeric closure self sealing test<\/strong> verifies the closure\u2019s ability to reseal after multiple punctures.<\/p><h3 data-section-id=\"oh8qbz\" data-start=\"3476\" data-end=\"3493\">Test Method<\/h3><ul data-start=\"3494\" data-end=\"3674\"><li data-section-id=\"ggzab5\" data-start=\"3494\" data-end=\"3536\">Each closure is punctured <strong data-start=\"3522\" data-end=\"3534\">10 times<\/strong><\/li><li data-section-id=\"pmo2fq\" data-start=\"3537\" data-end=\"3595\">Vials are immersed in <strong data-start=\"3561\" data-end=\"3593\">0.1% methylene blue solution<\/strong><\/li><li data-section-id=\"ae9dix\" data-start=\"3596\" data-end=\"3633\">A vacuum of <strong data-start=\"3610\" data-end=\"3620\">27 kPa<\/strong> is applied<\/li><li data-section-id=\"1296mch\" data-start=\"3634\" data-end=\"3674\">Samples are observed for dye ingress<\/li><\/ul><h3 data-section-id=\"5d1q1o\" data-start=\"3676\" data-end=\"3701\">Acceptance Criteria<\/h3><ul data-start=\"3702\" data-end=\"3738\"><li data-section-id=\"7544vr\" data-start=\"3702\" data-end=\"3738\"><strong data-start=\"3704\" data-end=\"3738\">No dye penetration in any vial<\/strong><\/li><\/ul><h3 data-section-id=\"1w86a7q\" data-start=\"3740\" data-end=\"3761\">Testing Insight<\/h3><p data-start=\"3762\" data-end=\"3844\">This test simulates multi-dose vial usage. Poor sealing performance may result in:<\/p><ul data-start=\"3845\" data-end=\"3917\"><li data-section-id=\"u9or8\" data-start=\"3845\" data-end=\"3872\">Microbial contamination<\/li><li data-section-id=\"zpsekz\" data-start=\"3873\" data-end=\"3894\">Loss of sterility<\/li><li data-section-id=\"76r0zi\" data-start=\"3895\" data-end=\"3917\">Reduced shelf life<\/li><\/ul><h3 data-section-id=\"1gkez9i\" data-start=\"3919\" data-end=\"3947\">Recommended Instrument<\/h3><p data-start=\"3948\" data-end=\"4182\">The <strong data-start=\"3952\" data-end=\"3990\">Cell Instruments LT-03 Leak Tester<\/strong> offers stable vacuum control and visual detection, making it ideal for methylene blue ingress testing. Its customizable chambers accommodate various vial sizes, improving testing flexibility.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5db9dc5 elementor-widget elementor-widget-image\" data-id=\"5db9dc5\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.pharmacopoeiatest.com\/ro\/vacuum-leak-tester-for-syringe-plunger-stopper-and-seal\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"589\" height=\"1024\" src=\"https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-589x1024.webp\" class=\"attachment-large size-large wp-image-2598\" alt=\"Leak tester for usp 381 Elastomeric Closure Self Sealing Test\" srcset=\"https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-589x1024.webp 589w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-173x300.webp 173w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-768x1336.webp 768w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-883x1536.webp 883w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-1178x2048.webp 1178w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-7x12.webp 7w, https:\/\/www.pharmacopoeiatest.com\/wp-content\/uploads\/2026\/04\/Leak-tester-for-uso-381-Elastomeric-Closure-Self-Sealing-Test-scaled.webp 1472w\" sizes=\"(max-width: 589px) 100vw, 589px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0cae69b elementor-widget elementor-widget-text-editor\" data-id=\"0cae69b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"6536\" data-end=\"6949\">Ensure compliance with <a href=\"https:\/\/www.uspnf.com\/sites\/default\/files\/usp_pdf\/EN\/USPNF\/revisions\/381_elastomeric_closure_for_injections_rb_notice.pdf\" target=\"_blank\" rel=\"noopener\">USP 381<\/a> by implementing precise penetrability, fragmentation, and self-sealing tests. With advanced instruments like the NPT-01 and LT-03, laboratories can achieve accurate, repeatable, and efficient testing. Optimize your quality control workflow, reduce risk, and meet global pharmaceutical standards with reliable elastomeric closure testing solutions tailored to your application needs.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Elastomeric Closures Functionality Test USP 381 USP 381 defines functional testing requirements for elastomeric closures, focusing on penetrability, fragmentation, and self-sealing performance. These tests simulate real usage conditions to ensure closures maintain integrity, prevent contamination, and allow safe needle penetration. Compliance requires precise force measurement, controlled puncture procedures, and reliable leak detection. Proper instrumentation and [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[26],"tags":[],"class_list":["post-2594","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"pharmacopoeiatest","author_link":"https:\/\/www.pharmacopoeiatest.com\/ro\/author\/pharmacopoeiatest\/"},"uagb_comment_info":0,"uagb_excerpt":"Elastomeric Closures Functionality Test USP 381 USP 381 defines functional testing requirements for elastomeric closures, focusing on penetrability, fragmentation, and self-sealing performance. These tests simulate real usage conditions to ensure closures maintain integrity, prevent contamination, and allow safe needle penetration. Compliance requires precise force measurement, controlled puncture procedures, and reliable leak detection. 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