WS-12 is one of the original Wilkinson Sword cooling agents and is reported to be as cooling as the WS-3 compound. (Cooling strength of 150 as compared to (-)-menthol at 100). Data from: Watson, Hems, Rowsell & Spring, J. Soc. Cosmet. Chem., 1978, pp. 185-200.
More recently, Furrer et al, indicates that in isointensity measurements vs 2 ppm menthol that WS-12 was essentially the same cooling strength as menthol. See Stefan M. Furrer, et al., New Developments in the Chemistry of Cooling Compou ...
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