Resources/EU CosIng & INCI
EU CosIng and INCI: what formulators actually use
Published May 1, 2026
Disclaimer: The information provided in this guide is for educational and regulatory context purposes only and does not constitute formal legal advice. Compliance requirements can vary based on formulation, regional authority updates, and specific product claims. Consult a certified regulatory affairs professional or specialized legal counsel for official filings.
INCI (International Nomenclature of Cosmetic Ingredients) is the standard ingredient naming system shown on cosmetic labels in many markets. In the EU context, the CosIng database ties those names (and related identifiers) to cosmetic function, allowed uses, and restrictions where applicable.
Key takeaways
- CosIng is a navigation aid, not a yes/no answer — an entry's allowed/restricted/banned status still requires reading which annex applies, the product category, max concentration, and any national overlay.
- The INCI name on your label has to match the regulatory row you relied on — a supplier's trade name, salt, or hydrate form can map to a different INCI line than expected.
- Passing CosIng for cosmetic use doesn't clear every obligation — the same substance can still carry separate documentation or labelling duties under broader chemical law (e.g. REACH).
Why CosIng is not a single “yes/no” button
A CosIng entry may show whether a substance is allowed, restricted, or banned under the cosmetic Regulation—often with conditions. You still must read which annex or implementing rule applies, the product category, max concentrations, warnings, and any overlapping national measures. The database is a navigation aid to official requirements, not a substitute for reading the underlying legal text.
Matching your raw material to the right row
Suppliers may sell salts, hydrates, or solutions under trade names. If your CAS or structure maps to a different INCI line than the one on your label, you risk non-compliance even when “the chemical” is familiar. Normalize to the INCI that will appear on-pack and trace it to the regulatory row you relied on.
CosIng vs REACH-only obligations
Cosmetic placement and chemical law intersect. Something can appear workable in CosIng for rinse-off use but still carry documentation or labelling duties from broader frameworks. Your cross-functional review usually includes both regulatory affairs and product safety—not only R&D.
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