4-T-Butylcyclohexanol

4-T-Butylcyclohexanol is primarily used as a fragrance/perfuming agent and odor-masking component, typically at low concentrations, but fragrance-class materials are a common cause of stinging/irritant reactions in eczema and highly reactive skin. While it is not a strong active like an acid or retinoid and is generally tolerated by many users, its sensory function and contact exposure profile justify a mild irritation rating to reflect real-world risk in compromised barriers. Safety Notes: 4-T-Butylcyclohexanol (commonly used as a cooling/soothing anti-sting agent for sensitive skin, often referenced in industry as SymSitive® 1609) is found at very low levels (~0.005–0.05%) in mass-market moisturizers, cleansers, and after-sun products where it is used as a sensorial modulator rather than a primary active. Most leave-on soothing serums/creams cluster around ~0.1–0.5% per supplier/industry formulation practice and efficacy-use levels, while the highest consumer-available “intensive anti-redness/anti-stinging” leave-on products and concentrates can reach about 1.0% (higher levels are uncommon due to sensorial limits and diminishing returns).