CI 42090
Is CI 42090 safe for seborrheic dermatitis?
CI 42090 is not automatically unsafe for seborrheic dermatitis, but there is not enough direct ingredient-specific evidence to give it a strong suitability verdict. It is used to colour cosmetics and some hair products, not to moisturise skin or treat a flare.
No reliable Malassezia finding was found for CI 42090 itself. In a coloured cleanser, shampoo or gel, the cleansing system, fragrance and other actives are more likely to determine whether inflamed skin feels comfortable. Stop using the finished product if it repeatedly increases itching, burning or redness.
Community Signals
Loading community reports…
What is it?
A quick identity check, separate from the seb derm guidance above.
01 / 05- Material type
- Colour additive
- Cosmetic function
- Colorant, Hair Dyeing
What is CI 42090 used for in skincare?
CI 42090 is a colour ingredient used to give products a blue tone or adjust the final shade. It may appear in rinse-off products, hair colour systems and decorative cosmetics. Its job is visual, so it does not make the formula gentler, more moisturising or more effective against seborrheic dermatitis.