Ensuring the stability and longevity of your cosmetic products is essential for regulatory compliance and consumer confidence. Our stability testing services assess how your product performs under controlled environmental conditions, helping you launch safe, effective, and reliable products to market. Why Stability Testing is Important To legally sell cosmetic products in the UK and EU, you must confirm that they remain safe and stable throughout their intended shelf life. Under Cosmetic Regulation (EC) No. 1223/2009, cosmetic products must demonstrate a minimum durability of 30 months, or otherwise be clearly marked with a Period After Opening (PAO). Our accelerated stability testing programme simulates long-term storage by placing products under elevated temperature conditions for 12 weeks. This process replicates approximately 30 months of real-time storage at 20°C, allowing us to identify potential changes in appearance, texture, colour, odour, and overall performance in a shorter timeframe. What We Test We carry out stability testing across a wide range of product categories, including: - Personal Care (skincare, haircare, body care)- Household Care (cleaning solutions, detergents)- Fragrances and candles- Sun care products…and more. All testing is conducted by experienced professionals to ensure your formulation meets both regulatory requirements and commercial expectations. What You’ll Receive A comprehensive final stability report issued after the 12-week testing period, detailing observations, results, and confirmation of stability under the tested conditions. How to Submit Your Product for Testing Please send a minimum of 300ml of your finished product in a suitable container. The product should not be pre-filled into retail packaging, as we will decant the product ourselves for testing. Compatibility Testing (Optional Add-On) Compatibility testing assesses how your formulation interacts with its intended packaging over time. This ensures there are no adverse reactions such as leaching, discolouration, material degradation, or changes to product performance caused by contact with the packaging. If you are purchasing compatibility testing alongside stability testing, please send: - Four samples of the final packaging you intend to use.- A minimum of 4 x the amount of product needed to fill the packaging. Please ensure the product is packaged separately to the final packaging, ready for us to decant. Before shipping, please download and complete the Stability Testing Submission Form available here. A printed copy of the completed form must be included inside your parcel. Ship your product and completed form to: Naturally Balmy LtdUnit 17Riverside Park Industrial EstateStation RoadWimborneDorset BH21 1QUUnited Kingdom For any questions, feel free to contact us.
