This International Standard gives general guidelines for the detection and identification of specified
microorganisms in cosmetic products as well as for the detection and identification of other kinds of aerobic
mesophilic non-specified microorganisms in cosmetic products.
Microorganisms considered as specified in this International Standard might differ from country to country
according to national practices or regulations. Most of them considered as specified microorganisms include
one or more of the following species: Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus and
Candida albicans.
In order to ensure product quality and safety for consumers, it is advisable to perform an appropriate
microbiological risk analysis in order to determine the types of cosmetic product to which this International
Standard is applicable. Products considered to present a low microbiological risk include those with low water
activity, hydro-alcoholic products, extreme pH values, etc.
The method described in this International Standard is based on the detection of microbial growth in a nonselective
liquid medium (enrichment broth) suitable to detect microbial contamination, followed by isolation of
microorganisms on non-selective agar media. Other methods can be appropriate depending on the level of
detection required.
In this International Standard specific indications are given for identification of Pseudomonas aeruginosa,
Escherichia coli, Staphylococcus aureus and Candida albicans. Other microorganisms that grow under the
conditions described in this International Standard, may be identified by using suitable tests according to a
general scheme (see Annex A). Other standards (e.g., ISO 18416, ISO 21150, ISO 22717, ISO 22718) may
be appropriate.
Because of the large variety of cosmetic products within this field of application, this method might not be
suited in every detail, to some products (e.g. certain water-immiscible products). Other methods
(e.g. automated) can be substituted for the test presented here provided that their equivalence has been
demonstrated or the method has been otherwise validated.
ISO 18415:2007 Referenced Document
EN 12353 Chemical disinfectants and antiseptics - Preservation of test organisms used for the determination of bactericidal (including Legionella), mycobactericidal, sporicidal, fungicidal and virucidal (including bacteriophages) activity*, 2021-08-31 Update
ISO 18415:2007 history
2022ISO 18415:2017/Amd 1:2022 Cosmetics — Microbiology — Detection of specified and non-specified microorganisms — Amendment 1
2017ISO 18415:2017 Cosmetics - Microbiology - Detection of specified and non-specified microorganisms
2007ISO 18415:2007 Cosmetics - Microbiology - Detection of specified and non-specified microorganisms