Abstract:The dielectric relaxation studies have been carried out on the ternary mixture of aniline with 2-alkoxyethanols (2-methoxyethanol, 2-ethoxyethanol and 2-butoxyethanol) in the dilute solution of non polar solvents benzene, CCl₄, 1,4-dioxane and toluene. The solutions were prepared for various molar ratios (1:3, 1:2, 1:1, 2:1 and 3:1) over the frequency at 9.43GHz in room temperature by using X-Band microwave technique were studied. The dielectric parameters like  0 , ',  " and are calculated. In addition, the dielectric relaxation times 1 2 and 0 have been calculated by employing Higasi's method and activation energies f and f have been determined using dielectric data. The most likely association between hydroxyl groups of 2-alkoxyethanols with the amino group of aniline was studied. The results showed that the interaction of the order: 2-butoxyethanol >2-ethoxyethanol >2-methoxyethanol and play an important role in determination of the strength of hydrogen bond. 2-alkoxyethanol and aniline are known for their self-association through intermolecular hydrogen bonding. Aniline has a phenyl group attached to an amino group having various applications. For example, as additives to rubber processing chemicals, herbicides [7],rocket fuel [8], synthetic dye industry [9] and emerged as an analgesic drug [10]. In the other hand, 2-alkoxyethanols is bifunctional organic compound and it contains both hydroxyl and ethergroups as well as an alkyl group. 2-alkoxyethanol is commercially known as cellosolves, in their pure state which is self-associated and form cyclic dimers in which the hydroxy proton of one cellosolve molecule is bound to the ether oxygen atom of the other [11]. The present paper reports dielectric constants, dielectric loss, dielectric relaxation time and activation free energy for ternary mixtures containing aniline with2-alkoxyethanols (2-methoxyethanol, 2-ethoxyethanol and 2-butoxyethanol) in different non polar solvents (benzene, CCl 4 , 1,4 dioxane and toluene) at room temperatures. Studying intermolecularHbonding between hydroxyl group of 2-alkoxyethanol and N-H group of aniline and interactions between the mixtures containing 2-alkoxyethanol are very important not only because of their selfassociation, but also due to the strong intramolecular effects produced by the presence of -O-and -OH groups in the same molecule [12].