Science
Mechanism of Action
Captan functions as a non-specific thiol reactant. It disrupts microbial life by covalently binding to sulfhydryl (-SH) groups in both proteins and non-protein cellular components. This action effectively shuts down the Krebs cycle and inhibits cellular respiration, preventing fungi and bacteria from producing energy or reproducing.
Research
Clinical Evidence
Medium confidence1%
Key findings
- 01 Established as the benchmark concentration for mitigating dandruff and serving as a bacteriostatic agent in liquid soaps.
- 02 Identified as the upper limit for topical tolerance in preservative testing, though skin sensitization was still observed at this level.
Transparency
Dusting Analysis
Because Captan is a prohibited substance in most major markets (EU, Canada, ASEAN), its presence at any concentration in modern skincare is a regulatory red flag rather than a 'dusting' issue.
The Formula
Formulation
Stability
Highly sensitive to alkaline environments; the molecule undergoes rapid hydrolysis when pH exceeds 7.0. It requires slightly acidic conditions for structural integrity.
Conflicts
- Alkaline ingredients
- Strong bases
- Strong oxidizing agents
- Sulfhydryl-containing compounds
Safety
Safety Profile
Prohibited for cosmetic use in the EU, Canada, and ASEAN. While the EPA has moderated its carcinogenicity classification for residential use, its high potential for irritancy and sensitization led the CIR to deem existing safety data insufficient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to its prohibited regulatory status and high risk of skin sensitization, Captan is unsuitable for modern precision skincare.
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