Science
Mechanism of Action
Strontium Nitrate selectively targets and blocks type C nociceptors, which are specialized nerve endings responsible for transmitting itching, burning, and stinging sensations. The strontium ions are believed to interact with epidermal nerve cells, potentially altering their depolarization and repolarization processes, interfering with ion channel operation, or suppressing neurotransmitter release, thereby preventing or counteracting irritation signals. Strontium ions can also engage with calcium-sensing receptors on these nerve fibers.
Research
Clinical Evidence
High confidence20%
Key findings
- 01 Significantly shortened the duration and reduced the mean magnitude of chemically-induced skin irritation, even when combined with a highly acidic 70% glycolic acid peel (pH 0.6).
- 02 Demonstrated potent antipruritic (anti-itch) properties, effectively reducing the itch associated with facial peels.
- 03 Significantly decreased skincare-induced burning, stinging, and facial redness, proving beneficial for individuals with Rosacea and inhibiting tingling sensations from glycolic acid peels.
- 04 A strontium cream significantly reduced itching symptoms in Hidradenitis Suppurativa patients, with mean itch scores decreasing from 3.80±0.90 to 2.28±1.50 (p<0.001).
Transparency
Dusting Analysis
The provided research data does not contain information regarding dusting properties of Strontium Nitrate in cosmetic formulations. It is typically used in a dissolved state within liquid or cream bases.
The Formula
Formulation
Stability
Strontium Nitrate is a stable white crystalline powder, though as a strong oxidizer, it requires protection from flames, sparks, overheating, and frost. It exhibits good stability and compatibility in aqueous solutions within a pH range of 5.0-7.0, and is also compatible with acidic formulations (pH 0.5-6, preferably 3-5) when co-formulated with hydroxy acids.
Synergies
- Alpha/beta-hydroxy acids (e.g., glycolic acid)
- Retinoids
- Anti-acne ingredients
- Sunscreens
Conflicts
- Strong reducing agents
- Combustible materials
- Hydrocarbons
- Strong acids
- Strong bases
Safety
Safety Profile
The Scientific Committee on Cosmetic and non-food products (SCCNFP) noted in 1998 that while the strontium cation is not toxic, Strontium lactate, Strontium nitrate, and Strontium polycarboxylate required further assessment; however, no subsequent comprehensive safety assessment by SCCS for Strontium Nitrate in cosmetics has been identified. While raw strontium nitrate is classified as an oxidizer and irritant, in cosmetic formulations, its primary function is to reduce irritation, suggesting a low irritancy and sensitization potential at effective use concentrations. Information regarding pregnancy safety is not available.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Strontium Nitrate is a valuable ingredient for precision skincare, effectively mitigating a broad spectrum of sensory irritations and enhancing the tolerability of potent active formulations, particularly beneficial for sensitive and reactive skin types.
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