--- type: "WebPage" title: "Laboratory for Analysis and Quantification of 1,4-Dioxane according to CSAR" description: "Do you need a 1,4-dioxane analysis according to CSAR? 1,4-Dioxane and Cosmetics The 1,4-dioxane is a chemical substance classified as a probable human carcinogen by the United States Environmental Protection Agency (EPA). In the cosmetics industry, this molecule can form..." resource: "https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/analysis-1-4-dioxane-csar/" tags: ["EN", "pll_67483be2bf5cd", "Clément BOENARD"] timestamp: "2026-07-08T08:19:43Z" published: "2024-11-28T10:20:29Z" language: "en" author: "Laure Durieux" --- # Laboratory for Analysis and Quantification of 1,4-Dioxane according to CSAR ## Do you need a 1,4-dioxane analysis according to CSAR? ### 1,4-Dioxane and Cosmetics The [1,4-dioxane](https://filab.fr/en/our-services/our-analysis-services/chemical-analysis-laboratory/laboratory-analysis-of-14-dioxane.md) is a chemical substance classified as a **probable human carcinogen** by the United States Environmental Protection Agency (EPA). In the cosmetics industry, this molecule can form **unintentionally** during manufacturing processes, especially when surfactants or ethoxylated compounds are used. ### What is CSAR? The **CSAR** (*Cosmetic Supervision and Administration Regulation*) is the Chinese regulation that came into force on January 1, 2021, governing the supervision and administration of cosmetic products. It replaced the previous 1989 regulation and aims to strengthen the quality, safety, and efficacy of cosmetics on the Chinese market. ### CSAR and 1,4-Dioxane In China, CSAR requires that cosmetic products do not contain prohibited substances and that impurity levels are controlled to ensure consumer safety. Although 1,4-dioxane is not explicitly listed among the prohibited substances, its presence as an [impurity](https://filab.fr/en/our-services/our-analysis-services/laboratory-detection-identification-impurities.md) must be minimized as much as possible. Chinese authorities may require tests to detect and quantify 1,4-dioxane in cosmetic products to ensure it does not exceed levels considered safe. ## FILAB laboratory performs 1,4-dioxane quantification according to CSAR ### Why choose FILAB for 1,4-dioxane quantification according to CSAR? The FILAB laboratory is the ideal partner for 1,4-dioxane quantification within the CSAR framework thanks to its expertise in chemical analysis, its [state-of-the-art equipment](https://filab.fr/en/our-technical-resources.md) ([GC-MS](https://filab.fr/nos-moyens-techniques/laboratoire-analysis-chromatographie-gc-ms/), [HS-GC-MS](https://filab.fr/en/our-technical-resources/hs-gc-ms-analysis-in-the-laboratory.md), [FTIR](https://filab.fr/en/our-technical-resources/laboratory-analysis-ftir-spectroscopy.md), [NMR](https://filab.fr/en/our-technical-resources/laboratory-analysis-nmr.md)) and its interpretation of results to assess compliance with standards ([REACH](https://filab.fr/en/our-services/our-analysis-services/laboratory-reach-analysis/reach-analysis-in-cosmetics.md), [FDA](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/laboratory-fda-cosmetics.md), …). It guarantees accurate results that meet Chinese regulatory requirements, while providing personalized support, from [method validation](https://filab.fr/en/our-services/our-expertise-services/life-cycle-of-an-analytical-method-in-the-laboratory/laboratory-analytical-method-validation/validation-of-analytical-methods-on-your-cosmetic-products-according-to-the-iso-22176-standard.md) to formulation optimization. With its responsiveness and flexibility, FILAB is committed to delivering fast results tailored to your needs to ensure your cosmetic products comply with the Chinese market. ## our analysis services according to CSAR [Analysis and quantification of heavy metals according to CSAR](https://filab.fr/en/our-services/our-analysis-services/laboratory-analysis-heavy-metal/analysis-laboratory-according-to-chinese-regulations-csar.md) [Residual solvent analysis](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/laboratory-for-the-analysis-of-residual-solvents-in-cosmetic-products.md) [Quantification of preservatives in cosmetic products](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/laboratory-analysis-preservatives-cosmetic.md) [Analysis and quantification of methanol according to CSAR](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/analysis-methanol-csar.md) Analysis of sunscreens (organic and inorganic) Validation of cleaning processes ## Our cosmetic analysis services Heavy metal analysis in [cosmetic raw materials](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics.md) by [ICP-MS](https://filab.fr/en/our-technical-resources/laboratory-analysis-icp-icp-ms-icp-aes.md): natural mica, sericites, metal oxides ([titanium oxide](https://filab.fr/nos-prestations/analyse/laboratoire-analysis-metallurgiques/laboratoire-analyse-alliage-titane-ta6v/), zinc oxide, iron oxide...), talc, clay... [Analysis of elemental impurities by ICP according to USP 233 in pharmaceutical products](https://filab.fr/nos-prestations/analyse/laboratoire-analysis-ich-q3d/) (ICH Q3D regulatory compliance) Quantification of heavy metals or trace catalysts in [packaging and packaging materials](https://filab.fr/en/sectors-of-activity/health-pharmaceutical-cosmetics/packaging-analysis-laboratory-for-the-pharmaceutical-industry.md) Heavy metal testing according to [ISO 21392](https://filab.fr/en/determination-of-heavy-metals-according-to-iso-213922021.md) [Characterization of cosmetic powders](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/analysis-characterization-cosmetic-powders.md) Quantitative analysis of heavy metals in [finished cosmetic products](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics.md) by ICP-MS: lipstick, eyeshadow, mascara, eyeliner... [Mineral chemical analysis](https://filab.fr/en/our-technical-resources/our-mineral-analysis-equipment.md) [Determination and quantification of trace mercury in cosmetics according to ISO 23674 and 23821](https://filab.fr/en/our-services/our-analysis-services/laboratory-analysis-heavy-metal/determination-trace-amounts-mercury-cosmetics-according-iso-fdis-23674.md) [Heavy Metal Analysis for the cosmetics industry](https://filab.fr/en/our-services/our-analysis-services/laboratory-analysis-heavy-metal.md)