Science
Mechanism of Action
HC BLUE NO. 4 functions exclusively as a cosmetic colorant, providing a blue pigment to products without offering any direct physiological benefits to the skin.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
For maintaining product integrity, it is advisable to store this ingredient in a cool, dry environment.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deferred its evaluation of HC BLUE NO. 4, acknowledging its prior assessment by the U.S. Food and Drug Administration (FDA). The FDA has affirmed its safe use for externally applied drugs and cosmetics, provided it adheres to their stringent specifications. It is explicitly prohibited for use in formulations intended for the eye area or lips. All applications in the United States necessitate FDA approval and certification.
Your Skin
Skin Compatibility
Our Assessment
Verdict
HC BLUE NO. 4 is an FDA-certified blue colorant for external cosmetic applications, serving an aesthetic purpose without offering direct skin benefits.
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References
Sources