Science
Mechanism of Action
This ingredient functions solely as a colorant by absorbing and reflecting light, thereby imparting a yellow color to the formulation or substrate.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
No specific stability information for HC YELLOW NO. 18 is available. However, a chemically similar ingredient, HC Blue 18, has demonstrated stability for up to 45 minutes when exposed to alkaline peroxide conditions.
Safety
Safety Profile
Specific safety data for HC YELLOW NO. 18 is not currently available, as it has not undergone a formal review by the Cosmetic Ingredient Review (CIR) Expert Panel. Related HC Yellow dyes, such as HC Yellow No. 4 and No. 5, have been assessed for safety, predominantly in hair dye applications. HC Yellow No. 4 was found safe for use in hair dyes at concentrations up to 0.75%, with a recommendation for nitrosamine content below 50 ppb. HC Yellow No. 5 was deemed safe as a hair dye ingredient up to 1.6% in hair coloring formulations and has also been reported in body and hand skin care products. Other HC dyes (e.g., HC Blue 18, HC Red No. 18, HC Yellow No. 16) have been evaluated by the SCCS and considered safe for specific hair dye uses.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to the lack of specific safety assessments and clinical efficacy data for HC YELLOW NO. 18 in skincare applications, its suitability for precision formulations remains undetermined.
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