Science
Mechanism of Action
In hair dye systems, it stabilizes pH alongside ammonia, facilitating dye precursor penetration into the hair shaft. This buffering action helps mitigate potential damage to hair and skin.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 EP1106166A2 / EP0148466A2 (Patent Literature): Ammonium nitrate with ammonia enables effective hair dyeing and color retention at lower pH, reducing damage.
- 02 Ni et al., 'Toxic dermatitis caused by ammonium nitrate released by a cold pack', Contact Dermatitis, 2016: A case report of toxic contact dermatitis from accidental exposure.
Transparency
Dusting Analysis
Ammonium Nitrate is not typically used as a leave-on skincare active, making dusting a non-relevant concern for this ingredient in cosmetic skin formulations.
The Formula
Formulation
Stability
It is highly hygroscopic and undergoes an endothermic reaction when dissolved. Stable in aqueous solutions, with standard 5% solutions typically having a pH of 4.5–6.0, but decomposes at high temperatures or with combustible materials.
Conflicts
- Combustible materials
- Strong reducing agents
- Strong acids
- Powdered metals
- Sulfur
Safety
Safety Profile
Ammonium Nitrate lacks a formal CIR safety assessment for topical leave-on use. It is recognized as a skin and eye irritant, classified by ECHA as causing serious eye damage (Category 1).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to its noted irritancy, lack of CIR assessment for topical use, and association with toxic contact dermatitis, Ammonium Nitrate is not recommended for skincare formulations.
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References
Sources