CI 42090 (Blue 1)
Ingredient Info
CI 42090, also known as Brilliant Blue or FD&C Blue No. 1, is a synthetic colorant used to give skincare products a blue tint. It serves no active skincare function and is included purely for visual appeal and product identification.
Potential concerns
- May cause allergic reactions or contact dermatitis in sensitive individuals
- Not recommended for those with known sensitivity to synthetic dyes
- Can stain skin or fabrics upon contact
Science: CI 42090 is approved for cosmetic use in the EU, US (as FD&C Blue No. 1), and most major markets. Limited peer-reviewed data exists on its dermal effects as a cosmetic colorant, though it has been used safely in food and pharmaceuticals for decades with a favorable safety profile.
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