Science
Mechanism of Action
As a direct dye, HC Orange No. 2 imparts color through non-oxidative interactions with hair components. Its mechanism of action concerning any specific beneficial effect on skin physiology or cellular processes remains unstudied and undocumented in current scientific literature.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
This ingredient is primarily used as a hair dye and is not commonly associated with 'dusting' in skincare formulations, which typically refers to the use of an ingredient at ineffective or marketing-driven percentages to imply benefits.
The Formula
Formulation
Stability
This ingredient demonstrates stability in solution (1-200 mg/ml in 0.5% carboxymethyl cellulose) for up to 6 hours at room temperature and 9 days when refrigerated (+4 °C). Protection from light and an inert gas atmosphere are critical for maintaining its integrity.
Conflicts
- Nitrosating substances
Safety
Safety Profile
The Scientific Committee on Consumer Products (SCCP) deemed HC Orange No. 2 safe for non-oxidative hair dye use up to 1.0%. As a secondary amine, it is susceptible to nitrosation; therefore, it must not be combined with nitrosating substances, and its nitrosamine content should be strictly below 50 ppb.
Your Skin
Skin Compatibility
Our Assessment
Verdict
HC Orange No. 2 is a hair dye with no documented skincare benefits and a medium irritancy potential, rendering its inclusion in precision skincare formulations questionable.
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References
Sources