12. The cooling agents WS-23 cooling agents, all collectively produce a cooling effect and potency is not strong chemicals. The most common cooling agents are menthol (especially L-menthol), but because of its strong odor and skin, mucosa and intense irritation of the eye, it is not a lot of use. Therefore, many scientists synthesis, extraction of a new generation of cooling agents. Cooling agents WS23 chemical name is N, 2,3- trimethyl-2- (1-methylethyl) butanamide, or N, 2,3. Trimethyl-2-isopropylbutanamide English name N, 2,3-trimethyl-2isopropl butanamide. referred to as WS-23. Formula: C10H21NO, molecular weight: 171.29. Characterized by Yue-lasting, fresh, non-irritating spicy, no bitterness, low dosage. Applications can give the product as a result of the cool, fresh feeling, widely used in food, beverages, candy, cosmetics, tobacco products, medicine and other