Science
Mechanism of Action
This ingredient functions by releasing hydroxide ions (OH-) to neutralize acidic components in a formula. At higher concentrations, its alkalinity can disrupt cellular lipids, leading to irritation, but when properly formulated, it safely modifies pH.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Cosmetic Ingredient Review (CIR) Safety Assessment (2018)
- 02 Journal of the American Academy of Dermatology (2006)
Transparency
Dusting Analysis
No data available indicates that ammonium hydroxide is commonly 'dusted' or used at excessively low, ineffective concentrations in formulations.
The Formula
Formulation
Stability
Ammonium hydroxide is highly volatile; its concentration can decrease over time due to ammonia gas evaporation if not stored in airtight packaging. It remains stable in sealed aqueous solutions.
Conflicts
- Strong acids (exothermic reaction)
- Copper and copper alloys (corrosion)
- Zinc
- Chlorine-based products (toxic gas formation)
- Formaldehyde
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) found ammonium hydroxide safe for use in cosmetics when formulated to be non-irritating. The EU mandates specific labeling and restricts ammonia content to 6% in professional hair products.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Ammonium Hydroxide is a valuable ingredient for precise pH adjustment in formulations, especially with active acids, when used within safe, non-irritating concentrations.
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References
Sources