Acyclic carboxamides having a physiological cooling effect

In a manufactured consumer product for application to or consumption by the human body, said product comprising a vehicle topically administrable to or consumable by the human body and containing as an adjuvant in said vehicle, a compound capable of stimulating the cold receptors of the nervous system in the surface tissues of the body when brought into contact therewith by topical application or consumption of the said vehicle, said product being:

• (i) A toiletry comprising a topically administrable vehicle containing as adjuvants therein a) said cold receptor stimulating compound and b) at least one of the following:
• an odourant, antiseptic, colourant or surfactant;
• (ii) a foodstuff or beverage comprising an orally ingestible vehicle containing as adjuvants therein
• (a) said cold receptor stimulating compound and b) a flavourant;
• or
• (iii) a tobacco or tobacco-containing manufacture containing said cold receptor stimulating compound;
• the improvement which comprises using as said cold receptor stimulating compound an effective amount of a cold receptor stimulating acyclic carboxamide of the formula:
• ##STR5## wherein R' and R" are each methyl or ethyl;
• R.sub.1 is methyl, ethyl or n-propyl;
• R.sub.2 and R.sub.3 are each C.sub.1 -C.sub.5 alkyl, with the proviso that at least one of R.sub.2 and R.sub.3 is branched at the carbon atom in the alpha or beta position;
• R.sub.1, r.sub.2 and R.sub.3 together providing a total of at least 5 carbon atoms.