Loading...
1-Naphthol and CI 42090 (BLUE 1) are both added colour ingredients. 1-Naphthol is found in 1 product while CI 42090 (BLUE 1) appears in 9, making CI 42090 (BLUE 1) the more widely used option.
Added colour
Colour pigment
Olia Hårfarge Metallic Silver 9.11
1-Naphthol is categorised as "Added colour" while CI 42090 (BLUE 1) is categorised as "Added colour". They serve different functions in skincare formulations.
In most cases, these ingredients can be used together. However, always patch test and introduce new ingredients gradually.
1-Naphthol is found in 1 products, while CI 42090 (BLUE 1) is found in 9 products in our database.
Some links on this site are affiliate links. We may earn a commission from purchases made through our links, at no extra cost to you. This helps us keep Gracie free and independent.
© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.