A composition comprising: (a) 40-90% by weight of pelargonic acid; and (b) at least one emulsifying agent belonging to the class of anionic surfactants having formula up to 15% by weight (R-(0CHR 1 -CHR 2) n -(0CHR 3 -CHR 4) m -0-) q -Z where R is a linear or branched C4-C18 alkyl radical, R1, R2, R3 and R4 are independently H or CH 3, n and m are identical or different integers from 0 to 30 and at least one of them is not 0, q is 1 or 2, Z represents a sulfate or phosphate group in acid form or a salt thereof, (c) 5-55% by weight of at least one organic solvent, selected from the group consisting of aliphatic hydrocarbons, esters of carboxylic acids, alcohols, unmodified vegetable oils, transesterified vegetable oils with C 1 -C 4 lower alcohols, (d) from 1 to < 15% by weight of at least one emulsifying agent belonging to the class of non-ionic surfactants, wherein the ratio between the weight content of the sum of anionic surfactants (b) and non-ionic surfactants (d) respect to pelargonic acid is 0.05-0.15, further comprising 0,1-5 % by weight, with respect of the total weight of the composition, of viscosity and rheology modifiers selected from the group consisting of polyaklyl methacrylate in mineral oil or vegetable oil, syntethic esters with alkyl of different length (from C1 to C18 and beyond, linear or branched), natural rubber dissolved in vegetable oils or esters or mineral oil, polyolefin, polycondensed fatty acids, polymer esters such complex esters, epoxydized oils, estolides, or polymerized vegetable oils, esters of rosin acid, polyalkylene glycols, hydroxyalkyl alkyl cellulose ethers, wherein the alkyl group of said hydroxyalkyl alkyl cellulose ethers contains from 1 to 3 carbons and the hydroxyalkyl group contains from 2 to 4 carbons. (a) 40-90% by weight of pelargonic acid; and (b) at least one emulsifying agent belonging to the class of anionic surfactants having formula up to 15% by weight (R-(0CHR 1 -CHR 2) n -(0CHR 3 -CHR 4) m -0-) q -Z where R is a linear or branched C4-C18 alkyl radical, R1, R2, R3 and R4 are independently H or CH 3, n and m are identical or different integers from 0 to 30 and at least one of them is not 0, q is 1 or 2, Z represents a sulfate or phosphate group in acid form or a salt thereof, up to 15% by weight (R-(0CHR 1 -CHR 2) n -(0CHR 3 -CHR 4) m -0-) q -Z where R is a linear or branched C4-C18 alkyl radical, R1, R2, R3 and R4 are independently H or CH 3, n and m are identical or different integers from 0 to 30 and at least one of them is not 0, q is 1 or 2, Z represents a sulfate or phosphate group in acid form or a salt thereof, where R is a linear or branched C4-C18 alkyl radical, R1, R2, R3 and R4 are independently H or CH 3, n and m are identical or different integers from 0 to 30 and at least one of them is not 0, q is 1 or 2, Z represents a sulfate or phosphate group in acid form or a salt thereof, (c) 5-55% by weight of at least one organic solvent, selected from the group consisting of aliphatic hydrocarbons, esters of carboxylic acids, alcohols, unmodified vegetable oils, transesterified vegetable oils with C 1 -C 4 lower alcohols, (d) from 1 to < 15% by weight of at least one emulsifying agent belonging to the class of non-ionic surfactants, wherein the ratio between the weight content of the sum of anionic surfactants (b) and non-ionic surfactants (d) respect to pelargonic acid is 0.05-0.15, further comprising 0,1-5 % by weight, with respect of the total weight of the composition, of viscosity and rheology modifiers selected from the group consisting of polyaklyl methacrylate in mineral oil or vegetable oil, syntethic esters with alkyl of different length (from C1 to C18 and beyond, linear or branched), natural rubber dissolved in vegetable oils or esters or mineral oil, polyolefin, polycondensed fatty acids, polymer esters such complex esters, epoxydized oils, estolides, or polymerized vegetable oils, esters of rosin acid, polyalkylene glycols, hydroxyalkyl alkyl cellulose ethers, wherein the alkyl group of said hydroxyalkyl alkyl cellulose ethers contains from 1 to 3 carbons and the hydroxyalkyl group contains from 2 to 4 carbons.