Original source
Scientific advice on hair dye ‘Basic blue 99’ (C059) (CAS No. 68123-13-7, EC No. 268-544-3) - Submissions IV & V
- Official date
- 2026-02-10
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The SCCS adopted a final opinion (SCCS/1683/25) on 2 February 2026, published on 10 February 2026, concluding that Basic Blue 99 is not safe at 1% in non-oxidative hair dye formulations due to potential genotoxicity. It also considers the ingredient a skin sensitiser and alerts to immediate-type hypersensitivity reactions. The European Commission will consider this opinion in the regulatory process under Regulation (EC) No 1223/2009.
The SCCS has issued a final opinion concluding that Basic Blue 99 is not safe for use as an ingredient in non-oxidative hair dye formulations at 1% due to potential genotoxicity. The opinion also notes that Basic Blue 99 is a skin sensitiser and raises an alert for immediate-type hypersensitivity reactions. This may impact the continued use of this ingredient in cosmetic products within the EU.
Official text
English translation — the official-language text prevails
Conclusion of the opinion:
(1) In light of the data provided, does the SCCS consider Basic Blue 99 safe, when used as an ingredient at 1 % in non-oxidative hair dye formulations?
Having evaluated all the available data, the SCCS does not consider the use of Basic Blue 99 safe for use as an ingredient in non-oxidative hair dye formulations because the collective evidence indicates a potential for genotoxicity.
(2) Does the SCCS have any further scientific concerns with regard to the use of Basic Blue 99 in cosmetic products?
Although there is an uncertainty regarding the exact composition of Basic Blue 99 batch that caused (partly severe) immediate-type hypersensitivity reactions, the SCCS considers this an alert for such a risk with the current batch specifications under consideration. The SCCS regards Basic Blue 99 a skin sensitiser.