Science
Mechanism of Action
This colorant functions by depositing pigment onto product surfaces, providing a distinct yellow tint. It acts solely as an aesthetic ingredient, without engaging in active biological mechanisms within skin cells or altering skin physiology.
Research
Clinical Evidence
High confidence0.5%
Key findings
- 01 At 0.5%, it was evaluated as safe for non-oxidative hair coloring products, with minimal skin absorption and negligible systemic exposure (SCCS, 2004).
- 02 An aqueous 3.0% solution demonstrated no significant ocular irritation or toxicity in rabbit studies (SCCNFP, 2004).
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Exhibits high stability to light and heat, maintaining its consistent lemon-yellow hue across a wide pH range of 3 to 8.
Conflicts
- Strong oxidizing agents
- Strong reducing agents (may bleach the azo bond)
Safety
Safety Profile
Approved by SCCS for hair dyes (0.5%) and by FDA as FD&C Yellow No. 5 for food, drugs, and cosmetics, including the eye area, requiring batch certification. While rare, Tartrazine sensitivity can occur, primarily via ingestion, but contact can affect sensitized individuals.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A widely approved and stable colorant, Acid Yellow 23 offers a consistent lemon-yellow hue with low irritation potential for most skin types, serving a purely aesthetic function in formulations.
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References
Sources