The purpose of stability testing of cosmetic products is to ensure that a new or modified product, when stored under appropriate conditions, maintains functionality and aesthetics as well as its intended physical, chemical and microbiological quality standards.
Each manufacturer must have tests adapted to its activity so that the development cycle of cosmetic products is relatively short and, moreover, so that testing activity is not economically disproportionate given the large number of products released each year. Each manufacturer should design its stability testing program to handle reasonable and necessary testing effectively.
This guide aims to establish rules to predict and ensure the stability of products in the market. Its purpose is to assist cosmetic product manufacturers in the selection and improvement of suitable stability tests. It is important for manufacturers to carefully consider new products and technologies and, where appropriate, adapt their tests to reflect differences between product types and formulations.
However, all methods that ensure the ultimate stability of a cosmetic product according to the categories specified in this guide are considered valid if they are at least equivalent to the relevant recommendations. Procedures should be implemented and documented within the manufacturer's internal system.
Tests may be performed under real-time or accelerated conditions, but must primarily provide:
Because cosmetic products are so diverse and inherently complex, it is not possible to establish standard stability tests. Manufacturers with detailed knowledge of their products and packages need the flexibility to modify test protocols and establish a solid scientific basis for evaluating product stability. Therefore, it has to develop specific tests to predict possible evolutions of the product, to address new and unusual technologies or to adapt them to products with long shelf lives.
Our organization also provides testing services within the scope of the COLIPA guide on stability tests of cosmetic products, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.
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