Science
Mechanism of Action
As an 'HC' dye, HC Green No. 1 functions by imparting color, predominantly in hair dyeing applications. Its specific mechanism of interaction or beneficial effects on the skin, beyond superficial coloration, is not documented in the available scientific literature.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
For chemically similar HC dyes, pH stability is often a significant consideration during formulation.
Safety
Safety Profile
No dedicated Cosmetic Ingredient Review (CIR) report or Scientific Committee on Consumer Safety (SCCS) opinion detailing specific safety parameters or maximum concentrations for general skin application was found. It is listed within EU cosmetic regulations, primarily for hair dyeing. Of note, HC Green No. 1 is excluded from tattoo and permanent make-up products according to Council of Europe guidelines, suggesting potential dermal concerns in those applications. It is crucial to distinguish this compound from FD&C Green No. 1 (CAS 4680-78-8), which has been delisted by the FDA for use in foods, drugs, and cosmetics.
Your Skin
Skin Compatibility
Our Assessment
Verdict
With no established skincare benefits, limited safety data specific to dermal application, and a primary role as a hair dye, the utility of HC Green No. 1 in precision skincare remains unsubstantiated.
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References
Sources