For cosmetic brands and manufacturers, partnering with accredited laboratories that provide ISO 17025 Cosmetic Testing services is key to ensuring product safety, compliance, and smooth access to global markets.
ISO/IEC 17025 is an internationally recognized standard for the competence of testing and calibration laboratories. Achieving this certification demonstrates that the laboratory’s technical capabilities, quality management system, and reliability of test results meet the highest international standards.
In the field of ISO 17025 Cosmetic Testing, key tests including microbial control and chemical component analysis are all conducted under this accredited framework.
This article introduces the 7 core standards related to ISO 17025 Cosmetic Testing, helping you make more informed decisions in quality control and regulatory compliance.
Quick Overview
| Standard / Item | Core Content | Scope | Key Requirements |
| New Technical Competence Requirements | Mandatory Verification of Digital Systems Added in ISO 17025:2025 | All accredited laboratories | The AI system must pass the dynamic data drift test, with FAR ≤ 0.1%. |
| Microbiological Testing Methods | USP <61> & <62> Microbiological Examination | Cosmetic raw materials and finished products | Total Aerobic Count, Pathogen Screening, Mold and Yeast Count |
| Preservation Challenge Test | NF EN ISO 11930/USP <51> | Aqueous formulations, preservation system validation | 28-day incubation period for the validation of preservative effectiveness |
| Chemical Analysis Requirements | Determination of Heavy Metals, pH Value and Active Ingredients | Various cosmetics | Heavy metal limits, method validation recovery rate 80%–120% |
| Method Validation and Uncertainty | Recovery rate, precision, 95% confidence interval | All test items | RSD ≤ 5%, expanded uncertainty ≤ 0.09 mg/kg |
| Whole Process Control of Testing | Sampling, Sample Processing, Retention Sample Management | From raw materials to finished products | Retention samples shall be stored for ≥90 days, and the incubation time shall be accurately recorded. |
| Data Integrity and Traceability | ALCOA+ Principles, Audit Trail | Electronic Record System | Electronic records shall be retained for ≥10 years, in compliance with FDA 21 CFR Part 11. |
1.New technical competence requirements of ISO 17025:2025
Mandatory Validation of Digital Systems
ISO 17025:2025 has introduced a number of significant revisions, among which mandatory validation of digital systems has become a core focus.
For laboratories performing cosmetic testing under ISO 17025, digital devices such as AI colony counting systems must undergo rigorous validation procedures:
- AI Testing Requirements: Shall pass dynamic data drift testing (e.g., injecting 15% noise data quarterly) and adversarial sample attack validation (FAR ≤ 0.1%).
- Software Validation: The LIMS shall be equipped with an audit trail function, and electronic records shall be retained for ≥ 10 years (in compliance with FDA 21 CFR Part 11).
Integration of Risk Management System
Clause 8.5 of the new standard adds new requirements: laboratories shall identify risks throughout the entire testing process (e.g., sampling contamination, instrument drift) and establish corresponding countermeasures (e.g., contingency plans for backup equipment).
For microbiological testing in ISO 17025 cosmetic testing, the uncertainty evaluation must include a 95% confidence interval (k=2). For heavy metal testing by ICP‑MS, the expanded uncertainty shall be ≤ 0.09 mg/kg.
Optimization of Clause Structure
The new version merges “Purchasing and Subcontracting” into “Externally Provided Products and Services”, requiring suppliers to hold ISO 9001 certification.
Meanwhile, it removes the declaration of correlation with ISO 9001 and emphasizes the core position of technical competence.
2.Microbiological Examination Standards (USP <61>/<62>)
USP <61> Microbiological Enumeration Tests
USP <61> is the most basic microbial limit test method used in ISO 17025 cosmetic testing, intended for the enumeration of total aerobic microorganisms in products. The method includes:
- Total Aerobic Microbial Count: Incubate at 30–35 °C for 3 days to determine the total bacterial count.
- Mold and Yeast Count: Incubate at 20–25 °C for 5–7 days using Potato Dextrose Agar (PDA) medium.
USP <62> Tests for Specified Microorganisms
USP <62> is used to screen for specified pathogenic microorganisms in cosmetics to ensure product safety for consumers:
- Staphylococcus aureus: Absent
- Pseudomonas aeruginosa: Absent
- Escherichia coli: Absent
- Candida albicans: Absent
- Salmonella: Absent
Laboratories certified for ISO 17025 cosmetic testing must strictly follow these standardized methods, using validated culture media and calibrated incubators to ensure accuracy and repeatability of test results.
3.Preservation Challenge Test Standard
NF EN ISO 11930 / USP <51>
For cosmetic formulations containing water, the effectiveness of the preservation system is critical. The preservation challenge test is a key item in ISO 17025 cosmetic testing for evaluating the preservative capacity of products.
Test Principle and Method
The preservative challenge test is conducted by inoculating the product with a mixed culture of microorganisms (bacteria, yeasts and molds) at a defined concentration, and periodically monitoring changes in microbial counts over a 28-day incubation period.
- Inoculated Microorganisms: Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Candida albicans, Aspergillus niger
- Observation Time Points: 0, 7, 14, 21 and 28 days after inoculation
- Judgment Criteria: Microbial counts are reduced below specified thresholds within the required time intervals.
Regulatory Significance
The preservative challenge test report issued by an ISO 17025-accredited cosmetic testing laboratory can support product registration and filing, validate shelf-life (PAO) claims, and meet the safety verification requirements of regulations such as MoCRA.
4.Chemical Analysis Standards
Heavy Metal Testing
Heavy metal contamination in cosmetics is a key regulatory focus worldwide. ISO 17025-accredited cosmetic testing laboratories use high-precision instruments for heavy metal analysis:
- Lead: Limit ≤ 0.05 mg/dm²
- Cadmium: ≤ 0.01 mg/dm²
- Mercury: ≤ 0.003 mg/kg
- Arsenic: Complies with the cosmetic standards of various countries
- Antimony: Subject to testing and control
The primary testing method employed is Inductively Coupled Plasma Mass Spectrometry (ICP-MS), which enables simultaneous multi-element determination with a detection limit at the ppt level.
Physicochemical Index Testing
The physicochemical indexes covered by ISO 17025 cosmetic testing include:
- pH Measurement: Using potentiometric method to ensure mildness when the product is in contact with skin.
- Viscosity Measurement: Evaluating product texture and stability.
- Density Measurement: Controlling product consistency.
- Moisture Content: Affecting product stability and microbial control.
- Determination of Anionic / Cationic / Non-ionic Active Substances: Ensuring surfactant content meets requirements.
Prohibited Substances Screening
ISO 17025-accredited cosmetic testing laboratories are also required to screen for the following prohibited substances:
- 1,4-Dioxane: Impurity that may be present in ethoxylated raw materials
- Formaldehyde: May be released by some preservatives
- Nitrosamines: Prohibited impurities
- Phthalates: Prohibited plasticizers
- Residual solvents: Shall comply with the requirements of ICH Q3C
5.Method Validation and Uncertainty Evaluation
Method Validation Requirements
In accordance with ISO 17025 cosmetic testing standards, laboratories shall fully validate the analytical methods employed:
- Recovery: 80% – 120%
- Precision: Relative Standard Deviation (RSD) ≤ 5%
- Limit of Detection (LOD): Shall be clearly defined and meet relevant regulatory requirements
- Limit of Quantitation (LOQ): Shall be validated and documented
Uncertainty Evaluation
ISO 17025 requires laboratories to perform uncertainty evaluation on test results:
- Microbiological testing: Includes a 95% confidence interval (k=2)
- Heavy metal testing: Expanded uncertainty ≤ 0.09 mg/kg (with reference to JJF 1059.1-2012)
Proficiency Testing
Laboratories accredited for ISO 17025 cosmetic testing must participate in proficiency testing on a regular basis:
- Shall pass at least one cosmetic proficiency testing program (e.g., NIFDC-CT2025-003 Sunscreen Agent Testing)
- Proficiency testing certification is a mandatory requirement for maintaining accreditation.
6.Control Standards for the Whole Testing Process
Sampling Specifications
ISO 17025 cosmetic testing imposes strict requirements on the sampling process:
- Method I – Sampling method for cosmetics: Specifies the sampling quantity, sampling tools and sampling procedure.
- Method II – Quantity for cosmetic analysis: Defines the minimum sample amount required for testing.
Sample Handling and Retention
The laboratory shall establish a complete sample management system:
- Sample retention: ≥ 90 days (in compliance with the Safety and Technical Standards for Cosmetics 2022 Edition)
- Accurate recording of incubation time: e.g., 37 °C ± 1 °C, 48 h ± 2 h
- Chain of custody: Ensure full traceability of samples from receipt to report issuance
Environmental Control
The environmental conditions of ISO 17025 cosmetic testing laboratories must meet the following requirements:
- Incubator temperature fluctuation: ≤ ±0.5 °C (in accordance with JJF 1101-2019)
- Clean bench cleanliness: shall meet ISO 14644-1 Class 5
- Biological safety cabinet: shall satisfy the requirements for microbiological operations
7.Data Integrity and Traceability Standards
ALCOA+ Principles
ISO 17025 for cosmetic testing requires laboratory data management to comply with the ALCOA+ principles:
- Attributable: Every action is linked to personnel, equipment, and time at the workstation.
- Legible: Records are clear and readable.
- Contemporaneous: Records are created synchronously when operations are performed.
- Original: Original records and converted records are preserved.
- Accurate: Mandatory fields and value ranges are verified.
Electronic Record Management
The new standard imposes strict requirements on electronic records:
- Audit Trail: Complete audit trail functions shall be implemented for electronic records.
- Retention Period: Critical electronic records shall be retained for ≥ 10 years.
- Electronic Signature: Comply with the requirements of FDA 21 CFR Part 11 and EU Annex 11.
System Validation
For ISO 17025-accredited cosmetic testing laboratories using AI systems, the following requirements must be met:
- Conduct regular validation of AI systems
- Document the validation process and results
- Take corrective actions for systems with insufficient recognition accuracy (e.g., 89%)
Summary
The ISO 17025 cosmetic testing standard system covers 7 core components, ranging from updated technical competence requirements to data integrity. Test reports issued by ISO 17025-accredited laboratories are recognized by signatories to the Mutual Recognition Arrangement (MRA) of the International Laboratory Accreditation Cooperation (ILAC), ensuring global credibility.
For cosmetic brands, partnering with laboratories compliant with the ISO 17025 cosmetic testing standard is a critical guarantee to ensure product safety and regulatory compliance, as well as smooth access to international markets.
If you are seeking a manufacturing partner that combines German-quality management with international regulatory standards, DESIFINE — backed by its German Technical Director system, GMPC and ISO 22716 certifications, and FDA-registered facility — can provide your brand with reliable one-stop support from formula development to finished product delivery.
