Sodium Salicylate

Sodium salicylate is a salicylate salt used as a preservative/solubilizer and sometimes as a salicylic-acid derivative; at typical leave-on levels it is less keratolytic than salicylic acid but can still sting or irritate compromised skin. Clinical experience and patch-test data show salicylates can provoke irritant reactions in reactive or barrier-impaired patients and are a known concern for some with aspirin/salicylate intolerance. Given the potential for cumulative irritation in routines (especially alongside acids/retinoids) and the need for patch testing in eczema-prone skin, a moderate score is most patient-safe. Safety Notes: In commercial cosmetics, sodium salicylate is most often used as a low-level preservative booster/chelating-supporting adjunct or pH-dependent antimicrobial aid, with some leave-on and rinse-off products listing it around 0.01–0.1% alongside phenoxyethanol/organic acids. Higher levels are seen in consumer-available keratolytic/anti-blemish toners, lotions, and body products (and some anti-dandruff-style rinse-off products) where it functions as a salicylate exfoliant/salt form, typically 0.5–2% depending on pH and irritation tolerance. Above ~2% is uncommon in mainstream OTC skincare due to tolerability and because stronger salicylate exfoliation is generally delivered via salicylic acid rather than its sodium salt.