Ingredient · dataset v56
CI 42090 and fungal acne
No known trigger
Why it's not a known trigger
A synthetic colorant with no fatty chain.
Used in tiny amounts for color.
Evidence strength
Judged neutral — no trigger evidence
Function
Colorant
Also listed as
Blue 1, Brilliant Blue FCF, FD&C Blue 1, Blue 1 Lake
Checked products with this ingredient (3)
Product types: Antifungal treatments, Toners
Antifungal treatments (2)
- Nizoral A-D Anti-Dandruff Shampoo (Ketoconazole 1%)
- Selsun Blue Medicated Anti-Dandruff Shampoo (Selenium Sulfide 1%)
Toners (1)
Related colorant
- Beta Carotene — No known trigger
- Bismuth Oxychloride — No known trigger
- Carmine — No known trigger
- Chromium Oxide Greens — No known trigger
- CI 19140 — No known trigger
- CI 28440 — No known trigger
- FD&C Yellow No. 6 — No known trigger
- Ferric Ferrocyanide — No known trigger
Sources
EU CosIng database — search the INCI name
Last reviewed: 2026-10-13 (dataset v56).
Questions
Does CI 42090 trigger fungal acne?
No known trigger: A synthetic colorant with no fatty chain.
Does CI 42090 feed Malassezia?
No known link: CI 42090 is judged with no known trigger. One screened ingredient is not a product verdict — when in doubt, ask a dermatologist.
Is this medical advice?
No. We screen ingredient lists; we never diagnose, treat, or certify products. When in doubt, ask a dermatologist.
Check a full list containing CI 42090 →
Not medical advice: we screen ingredient lists for potential triggers — we never diagnose, treat, or certify products. Dataset v56.