Science
Mechanism of Action
Functionally analogous to salicylic acid, Chlorosalicylic Acid is postulated to promote skin exfoliation by softening keratin, thereby aiding in the detachment of dead skin cells and preventing pore blockages. It may also contribute to reduced sebum secretion and improved hyperpigmentation. Specific isomers, such as 4-Chlorosalicylic Acid, are noted for potent antimicrobial activity and the ability to inhibit monophenolase and diphenolase, enzymes involved in melanin synthesis.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
There is no available information to indicate that Chlorosalicylic Acid is commonly dusted in cosmetic applications, nor are there thresholds for dusting behavior.
The Formula
Formulation
Stability
Solubility varies significantly among isomers; 3-Chlorosalicylic acid is water-soluble, while 4-Chlorosalicylic acid is water-insoluble but soluble in DMSO and ethanol. For optimal stability, the compound should be stored in a cool, dry, well-ventilated environment, away from incompatible substances, with containers securely sealed.
Conflicts
- Strong oxidizing agents
- Strong bases
- Active metals
Safety
Safety Profile
Safety information for 3-Chlorosalicylic acid is reportedly 'not available' from one source. General GHS classifications for various isomers (3-, 4-, and 5-Chlorosalicylic acid) indicate severe hazards, including toxicity if swallowed, causing skin irritation, serious eye irritation, and potential respiratory irritation. The oral LD50 in rats for 5-Chlorosalicylic acid is quantified at 250 mg/kg. Regulatory bodies, such as the New Zealand EPA, note that 3-Chlorosalicylic acid and 4-Chlorosalicylic acid lack individual approval for use as standalone chemicals but may be components in group-standard products. Critically, no specific cosmetic safety assessments by CIR, SCCS, or FDA were identified for Chlorosalicylic Acid or its isomers, only for Salicylic Acid.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Given the explicit GHS hazard classifications indicating skin and eye irritation, general toxicity, and the absence of specific cosmetic safety assessments by major regulatory bodies, Chlorosalicylic Acid is deemed unsuitable for precision skincare formulations.
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