Science
Mechanism of Action
As a synthetic pigment, HC YELLOW NO. 3 (also known as Acid Yellow 3 or CI 47005) primarily functions by imparting color to cosmetic formulations. In temporary applications like hair dyeing, it adheres superficially to the hair shaft. Beyond its coloring capabilities, it is also noted to act as a functional component in fragrance compositions.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
As a colorant, HC YELLOW NO. 3 is typically incorporated at low concentrations for aesthetic purposes rather than for active ingredient efficacy. Therefore, 'dusting' is not a relevant concern regarding its functional thresholds.
The Formula
Formulation
Stability
To maintain optimal stability and integrity, HC YELLOW NO. 3 should be formulated away from strong oxidizing agents, strong acids, and strong bases. Comprehensive stability testing is recommended for final formulations.
Conflicts
- strong oxidizing agents
- strong acids
- strong bases
Safety
Safety Profile
The Scientific Committee on Consumer Safety (SCCS) has evaluated Acid Yellow 3 (HC YELLOW NO. 3), considering it safe for use in non-oxidative hair colouring products at on-head concentrations up to 0.5%. The SCCS noted it as slightly irritant to skin and mucous membranes but confirmed it is not a skin sensitiser. They recommended that detailed analytical reports on impurities and stability tests be provided. In the United States, as D&C Yellow No. 10 (CAS 8004-92-0), it is permanently listed by the FDA and requires certification for use in drugs, cosmetics, and medical devices. For lip cosmetics specifically, its concentration is limited to 1% by weight.
Your Skin
Skin Compatibility
Our Assessment
Verdict
HC YELLOW NO. 3 is a valuable synthetic colorant for imparting a yellow shade in cosmetic formulations, deemed safe within regulated concentration limits with a low risk of sensitization, though it may present slight irritation in some instances.
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