Farnesol
Active
2,6,10-Dodecatrien-1-ol, 3,7,11-trimethyl-
Farnesol is a floral sesquiterpene alcohol used mostly as a fragrance and deodorant ingredient. There is little evidence it works as a mosquito repellent, and it appears in just one product here.
The evidence
Farnesol has essentially no controlled skin-repellency data behind it. In fragrance and cosmetics it is valued as a scent and a mild antibacterial, not as a bite deterrent.
Products using it
Regulatory notes
Source: EPA SRS active ingredient list export. Minimum risk (25(b)) status is applied separately when applicable.
Safety notes
A fragrance-grade alcohol that can act as a skin sensitizer in susceptible people. Its role in these products is cosmetic rather than protective.