Science
Mechanism of Action
It dissociates into zinc and borate ions in acidic environments, providing antimicrobial and fungicidal actions. Zinc oxide, a component, offers astringent and topical protectant qualities, contributing to its overall preservative effects.
Research
Clinical Evidence
Medium confidence1%
Key findings
- 01 Broad-spectrum antibacterial efficacy was demonstrated at 1% in hydrogel films.
- 02 Effective against microbial agents in burns, exhibiting antioxidant properties without significant toxicity at typical doses.
Transparency
Dusting Analysis
Zinc borate is used as an active ingredient and preservative, not typically as a filler. Its use is limited by concentration due to safety concerns, particularly for its boric acid component.
The Formula
Formulation
Stability
Zinc borate demonstrates high heat stability, with dehydration occurring at high temperatures. It remains stable under standard storage conditions.
Safety
Safety Profile
While acute mammalian toxicity is low, significant dermal absorption on damaged skin may cause irritation. Developmental toxicity is a high concern due to its boric acid component, leading to SCCS advice against use in young children and on peeling or irritated skin, with a maximum limit of 1.5% as boric acid.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Zinc borate shows promise for antimicrobial and antioxidant benefits, but its unreviewed CIR status and high developmental toxicity concerns, alongside SCCS warnings, warrant extreme caution and restrict its use, especially on compromised skin.
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References
Sources