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1-Naphthol and Iron Oxides are both added colour ingredients. 1-Naphthol is found in 1 product while Iron Oxides appears in 22, making Iron Oxides the more widely used option.
Added colour
Added colour
Olia Hårfarge Metallic Silver 9.11
1-Naphthol is categorised as "Added colour" while Iron Oxides 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 Iron Oxides is found in 22 products in our database.
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