Cooling agent (WS-3)

Aroma threshold values

Aroma characteristics at 1.0%. Virtually odorless

Taste threshold values

Taste characteristics at 10 to 100 ppm. Intense lingering cooling. The cooling sensation builds slow but steadily and grows to a lingering cooling mouthfeel with a slightly camphoraceous and minty character.

Flammability and Explosibility

Notclassified

Trade name

Winsense WS-3 (Renessenz)

Biological Activity

Cooling agent that is an agonist at TRPM8 receptors (EC 50 = 3.7 μ M).

Synthesis

0.89 g (0.0091 mol) of polyphosphoric acid (85%) and 0.42 g (0.0091 mol) of ethanol were weighed. 0.54 g (0.0046 mol) of diethylcarbonate was added dropwise slowly while cooling in an ice bath, wherein the temperature increases slightly. After about 5 minutes, 0.5 g (0.0030 mol) of p-menthane-3-carbonitrile was added. The reaction solution was heated and stirred for 102 hours at 150°C. At the end of the reaction by GC, about 70% of desired N-Ethyl-p-menthane-3-carboxamide was formed.Fig The synthetic method 1 of N-Ethyl-p-menthane-3-carboxamide