Use, in a deodorant composition, for destroying malodorous molecules of at least one compound of the family of the α-acetylenic ketones comprising at least one -CO-C≡C- or -C=C-CO- chain formation, corresponding to general formula 1 R- k -C≡C- -(C≡C) m - n -R 1 in which R and R 1 can represent, independently or simultaneously, a radical selected from ∘ an alkyl chain comprising from 1 to 9, preferably from 3 to 7 carbon atoms, linear or branched, substituted or unsubstituted, or ∘ a cycloalkane comprising from 3 to 8, preferably 5 or 6 carbon atoms, substituted or unsubstituted; or ∘ a furan ring, saturated or unsaturated, substituted or unsubstituted; or ∘ a pyran ring, saturated or unsaturated, substituted or unsubstituted; or ∘ an aromatic ring comprising from 6 to 8 carbon atoms, substituted or unsubstituted; or also ∘ a hydrogen atom; A represents a group selected from -(CH 2) x with x representing an integer with a value from 0 to 6, preferably from 0 to 4, (-CO) l with l representing an integer with a value of 0 or 1, or also a -(CH 2) y -O-(CH 2) z - chain formation with y and z representing, simultaneously or independently, an integer with a value from 0 to 6, preferably from 0 to 4, it being understood that x + y does not exceed the value 6; k, m and n are, simultaneously or independently, an integer with a value of 0 or 1, it being understood that k and n cannot simultaneously have a value of 0 if l is equal to 0; with the exception of 2-methyl-4-nonyn-3-one of formula C 4 H 9 -C≡C-CO-CH(CH 3) 2. R and R 1 can represent, independently or simultaneously, a radical selected from ∘ an alkyl chain comprising from 1 to 9, preferably from 3 to 7 carbon atoms, linear or branched, substituted or unsubstituted, or ∘ a cycloalkane comprising from 3 to 8, preferably 5 or 6 carbon atoms, substituted or unsubstituted; or ∘ a furan ring, saturated or unsaturated, substituted or unsubstituted; or ∘ a pyran ring, saturated or unsaturated, substituted or unsubstituted; or ∘ an aromatic ring comprising from 6 to 8 carbon atoms, substituted or unsubstituted; or also ∘ a hydrogen atom; ∘ an alkyl chain comprising from 1 to 9, preferably from 3 to 7 carbon atoms, linear or branched, substituted or unsubstituted, or ∘ a cycloalkane comprising from 3 to 8, preferably 5 or 6 carbon atoms, substituted or unsubstituted; or ∘ a furan ring, saturated or unsaturated, substituted or unsubstituted; or ∘ a pyran ring, saturated or unsaturated, substituted or unsubstituted; or ∘ an aromatic ring comprising from 6 to 8 carbon atoms, substituted or unsubstituted; or also ∘ a hydrogen atom; A represents a group selected from -(CH 2) x with x representing an integer with a value from 0 to 6, preferably from 0 to 4, (-CO) l with l representing an integer with a value of 0 or 1, or also a -(CH 2) y -O-(CH 2) z - chain formation with y and z representing, simultaneously or independently, an integer with a value from 0 to 6, preferably from 0 to 4, it being understood that x + y does not exceed the value 6; k, m and n are, simultaneously or independently, an integer with a value of 0 or 1, it being understood that k and n cannot simultaneously have a value of 0 if l is equal to 0;