{"id":3083,"date":"2018-08-26T10:14:00","date_gmt":"2018-08-26T07:14:00","guid":{"rendered":"https:\/\/bilim.gen.tr\/kozmetik-urunlerde-challenge-test-zorunlu-mudur\/"},"modified":"2026-08-12T11:34:39","modified_gmt":"2026-08-12T08:34:39","slug":"is-challenge-testing-mandatory-for-cosmetic-products","status":"publish","type":"post","link":"https:\/\/bilim.gen.tr\/en\/is-challenge-testing-mandatory-for-cosmetic-products\/","title":{"rendered":"Is Challenge Testing Mandatory for Cosmetic Products?"},"content":{"rendered":"<p><b>Challenge Testing (Preservative Efficacy Testing)<\/b> is a laboratory test designed to evaluate the effectiveness of a cosmetic product&#8217;s preservative system under controlled contamination conditions.<\/p>\n<p>In accordance with <b>ISO 11930<\/b>, the test begins by inoculating the cosmetic product with standardized concentrations of the following reference microorganisms:<\/p>\n<ul>\n<li><i>Pseudomonas aeruginosa<\/i><\/li>\n<li><i>Staphylococcus aureus<\/i><\/li>\n<li><i>Escherichia coli<\/i><\/li>\n<li><i>Candida albicans<\/i><\/li>\n<li><i>Aspergillus brasiliensis<\/i><\/li>\n<\/ul>\n<p>The preservative system is then evaluated by measuring the logarithmic reduction of these microorganisms at specified intervals, typically on <b>Days 2, 7, 14, and 28<\/b>.<\/p>\n<p><b>Is Challenge Testing Mandatory?<\/b><\/p>\n<p><b>Challenge Testing is generally required for cosmetic products that contain a preservative system and are repeatedly opened or exposed during consumer use.<\/b><\/p>\n<p>Challenge Testing is <b>not required<\/b> for finished products that are:<\/p>\n<ul>\n<li>Single-use products<\/li>\n<li>Packaged in containers that cannot be opened or contaminated during normal use<\/li>\n<\/ul>\n<p>Examples include:<\/p>\n<ul>\n<li>Single-use alcohol wipes<\/li>\n<li>Sheet masks<\/li>\n<li>Aerosol sprays<\/li>\n<li>Deodorant sprays<\/li>\n<li>Roll-on products<\/li>\n<\/ul>\n<p>For other cosmetic products, <b>Preservative Efficacy Testing (Challenge Testing)<\/b> is an essential study to demonstrate that the preservative system provides adequate microbiological protection throughout the product&#8217;s intended period of use.<\/p>\n<p>At <b>Bilim Laboratory<\/b>, <b>Challenge Testing (ISO 11930)<\/b> is performed within the scope of our <b>ISO\/IEC 17025 accreditation<\/b>, providing reliable and internationally recognized results to support cosmetic product safety and regulatory compliance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Challenge Testing (Preservative Efficacy Testing) is a laboratory test designed to evaluate the effectiveness of a cosmetic product&#8217;s preservative system under controlled contamination conditions. In accordance with ISO 11930, the test begins by inoculating the cosmetic product with standardized concentrations of the following reference microorganisms: Pseudomonas aeruginosa Staphylococcus aureus Escherichia coli Candida albicans Aspergillus brasiliensis [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":2784,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[45],"tags":[],"class_list":["post-3083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cosmetic"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Is Challenge Testing Mandatory for Cosmetic Products? - Bilim Laboratuvarlar\u0131<\/title>\n<meta name=\"description\" content=\"Kozmetik \u00fcr\u00fcnlerde Challenge Test ile mikrobiyal g\u00fcvenli\u011fi sa\u011flay\u0131n ve yasal uyumlulu\u011fu akredite laboratuvarla tamamlay\u0131n.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bilim.gen.tr\/en\/is-challenge-testing-mandatory-for-cosmetic-products\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Is Challenge Testing Mandatory for Cosmetic Products? 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