The invention comprises the triamines <;FORM:0908213/IV (b)/1>; wherein lower alkylene is one containing up to 7 carbon atoms, R1 is the cyclic portion of a saturated or unsaturated ionone or irone or is the 2-Me-5-isopropyl-cyclopent[en-(1)]yl radical (the significance of the square bracket is explained). R2, R3 are individually alkyl radicals of up to 7 C. atoms, or together with the N. atom to which they are attached, a 5 or 6-membered heterocyclic radical, and R4 is H or alkyl radical of up to 7 C. atoms and their salts. Suitable cyclic values for the terminal disubstituted-amino radical are morpholyl, piperidyl and pyrollidyl. The triamines are obtained by reductive condensation, with hydrogen, of a carbonyl compound <;FORM:0908213/IV (b)/2>; with a triamine <;FORM:0908213/IV (b)/3>; and, if desired, N-alkylating the product and/or transforming it into a salt. Acid salts are formed by reaction with hydrohalides e.g. hydrochlorides and hydrobromides, sulphates, nitrates, phosphates, arylsulphonates e.g. benzene- and toluene-sulphonates, tartrates, citrates, ascorbates, malates and oxalates. The salts can be converted to the free base by treating with e.g. sodium hydroxide from which quaternary salts can be obtained by reaction with alkyl halides e.g. methyl, ethyl and butyl chloride, methyl and propyl bromide, and ethyl iodide, alkyl sulphates e.g. methyl and ethyl sulphate, alkyl nitrates e.g. ethyl nitrate, aralkyl halides e.g. benzyl chloride and bromide, and aralkyl sulphates e.g. phenethyl sulphate. The preparation of N-(3-di Me amino propyl)propanediamine1,3 and N-(4-di Me amino butyl)propanediamine-1,3 from acrylonitrile and the corresponding amine via the nitriles is described.;FORM:0908213/IV>;FORM:0908213/IV>;FORM:0908213/IV>