This guide walks you through the process using the European regulatory framework—particularly Regulation (EC) No 1223/2009—as a reference, while keeping the explanation accessible and practical.
Understanding the Regulatory Framework
In the European Union, cosmetic products are regulated under Regulation (EC) No 1223/2009. This regulation sets out strict requirements to ensure product safety, including rules about which substances can or cannot be used.
Instead of providing a single list of “approved ingredients,” the regulation works through a system of annexes:
- Some substances are completely prohibited
- Others are restricted under specific conditions
- Certain categories, like colorants, preservatives, and UV filters, are explicitly regulated
This means that checking compliance is not about finding approval—it is about verifying that your ingredient is not banned and, if restricted, that you are using it within the allowed limits.
Step 1: Identify the Ingredient Precisely
Before checking any regulation, you must clearly identify the substance you are working with. This includes:
- INCI name (International Nomenclature of Cosmetic Ingredients)
- CAS number (Chemical Abstracts Service)
- Chemical identity and purity
This step is crucial because regulatory listings are precise. A small variation in naming or chemical structure can lead to misinterpretation.
Step 2: Check the Prohibited Substances List (Annex II)
The first regulatory checkpoint is Annex II of Regulation 1223/2009, which lists substances that are strictly prohibited in cosmetic products.
If your ingredient appears in this annex, it cannot be used under any circumstances in cosmetics marketed in the EU.
However, interpretation matters. Sometimes a substance may be listed with specific conditions or definitions. It is important to confirm that your ingredient truly falls within the scope of that listing.
Step 3: Verify Restrictions (Annex III)
If the ingredient is not prohibited, the next step is to consult Annex III, which includes substances allowed only under certain conditions.
These restrictions may involve:
- Maximum concentration limits
- Product type limitations (e.g., rinse-off vs leave-on)
- Target population restrictions (e.g., not for children under 3 years)
- Mandatory warnings or labeling requirements
Using a restricted ingredient is perfectly acceptable—as long as all conditions are strictly respected.
Step 4: Check Specific Functional Categories
Certain types of ingredients are regulated separately and must appear in dedicated annexes:
- Annex IV: Colorants
- Annex V: Preservatives
- Annex VI: UV filters
If your ingredient serves one of these functions, it must be listed in the corresponding annex. If it is not listed, it cannot be used for that specific purpose—even if it is otherwise safe.
Step 5: Consider Impurities and Trace Substances
Regulation 1223/2009 also addresses substances that may be present unintentionally, such as impurities or traces.
A prohibited substance may still be present in trace amounts if it is:
- Technically unavoidable
- Safe for human health
- Manufactured following good practices
This is a nuanced area and often requires a safety assessment rather than a simple yes/no check.
Step 6: Review SCCS Opinions and Updates
The Scientific Committee on Consumer Safety (SCCS) regularly evaluates ingredients and publishes scientific opinions. These assessments often lead to regulatory updates.
Even if an ingredient is currently allowed, future restrictions may be introduced. Staying informed about SCCS opinions helps you anticipate regulatory changes and avoid reformulation issues later.
Step 7: Perform a Safety Assessment
Compliance is not only about checking lists. Every cosmetic product must undergo a safety assessment conducted by a qualified professional.
This assessment considers:
- Toxicological profile of ingredients
- Exposure levels
- Product type and usage
- Target consumer group
An ingredient may be legally allowed but still unsuitable for a specific formulation if safety cannot be demonstrated under intended conditions of use.
Common Mistakes to Avoid
One frequent mistake is assuming that “natural” or “widely used” ingredients are automatically compliant. In reality, regulatory status depends on scientific evaluation and legal classification, not popularity.
Another common issue is relying on outdated information. Cosmetic regulation evolves continuously, and using obsolete data can lead to non-compliance.
Finally, incomplete ingredient identification—such as missing CAS numbers or unclear composition—can compromise the entire verification process.
Building a Reliable Compliance Workflow
Checking whether an ingredient is allowed in cosmetics is a structured process grounded in regulatory understanding . By systematically consulting Regulation 1223/2009 and its annexes, verifying restrictions, and integrating safety assessment principles, you can confidently develop compliant cosmetic products.
To streamline your formulation process, it is useful to establish a repeatable workflow:
- Always start with precise ingredient identification
- Systematically check all relevant annexes
- Document your findings
- Monitor regulatory updates regularly
Over time, this approach reduces risk and increases efficiency supporting both product safety and long-term market success.
