Science
Mechanism of Action
It functions as a cosmetic astringent by inducing a localized tightening effect on the skin tissue to minimize the appearance of pores. Additionally, it serves as a penetration enhancer, altering the skin's lipid barrier to facilitate the transdermal absorption of co-formulated active ingredients.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 A phototoxicity study involving 22 subjects demonstrated that concentrations between 0.015% and 0.03% are non-phototoxic when the ingredient is used as a denaturant.
- 02 Repeat-insult patch testing on formulations containing 47% SD Alcohol 40 (denatured with brucine sulfate) indicated the ingredient is a non-primary irritant and non-primary sensitizer.
Transparency
Dusting Analysis
This ingredient is typically a functional additive used at very low levels (often <0.1%) to denature alcohol; it is rarely marketed as a 'hero' ingredient, making dusting concerns irrelevant.
The Formula
Formulation
Stability
Highly sensitive to moisture and UV exposure; requires storage in cool, dark environments. Most stable in acidic to neutral aqueous systems.
Synergies
- Ethanol
- Tretinoin (for absorption enhancement)
Conflicts
- Strong oxidizing agents
- Strong bases
- Strong acids
Safety
Safety Profile
Strictly banned for cosmetic use in the European Union (Annex II). Due to its chemical relationship to strychnine, it is considered highly toxic and potentially fatal if inhaled or swallowed in its concentrated form.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While effective as a denaturant and absorption aid, its toxic alkaloid profile and regulatory bans in the EU make it an unfavorable choice for modern precision skincare.
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