Regulatory Status
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Safety Data
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Expert Verdict
Photosensitizer that generates reactive oxygen species upon light exposure; known to cause serotonin syndrome with MAOIs/SSRIs at systemic doses. Not evaluated by SCCS or CIR for cosmetic use. May cause staining to skin and nails.
Regulatory Flags
Frequently Asked Questions
Is Basic Blue 9 (Methylene Blue) safe in cosmetics?
Photosensitizer that generates reactive oxygen species upon light exposure; known to cause serotonin syndrome with MAOIs/SSRIs at systemic doses. Not evaluated by SCCS or CIR for cosmetic use. May cause staining to skin and nails. The EU classifies Basic Blue 9 (Methylene Blue) as "permitted". Safety rating: MODERATE.
Is Basic Blue 9 (Methylene Blue) allowed in the EU?
Basic Blue 9 (Methylene Blue) EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Basic Blue 9 (Methylene Blue) do in cosmetics?
Basic Blue 9 (Methylene Blue) functions as: Hair colorant (phenothiazinium dye); biological stain and pharmaceutical agent. It is classified as a cosmetic ingredient in our database. CAS number: 61-73-4.
What is the Margin of Safety for Basic Blue 9 (Methylene Blue)?
not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.
Compliance Tools
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Related Ingredients
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